Latest news with #IceAge
Indian Express
21 hours ago
- Science
- Indian Express
Bed bugs were likely one of the first pests found in cities, new study finds
Common bed bugs (Cimex lectularius) grew in number when humans started living together in the first cities. These tiny bloodsuckers were likely the first insect pests to thrive in city environments, and maybe even the first urban pests, according to a new study by scientists at Virginia Tech, United States, that was published in Biology Letters on May 28. Bed bugs originally fed on bats. But around 245,000 years ago, one group of bedbugs started feeding on humans, likely beginning with Neanderthals. About a year ago, Lindsay Miles from Virginia Tech began studying bedbug genetic data to see how their populations changed over time. Bedbug numbers dropped around 19,000 years ago, when the Ice Age ended and habitats changed. Both types of bedbugs did decline, but the ones that fed on humans increased sharply some 13,000 years ago, stayed steady for a while, and then rose again 7,000 years ago. In comparison, the population of bedbugs that feed on bats are still decreasing. The big change from fewer to more bedbugs happened around the same time the first cities appeared in western Asia and started to grow, as per the study. Before that, people moved around a lot and didn't often meet other groups, so bedbugs didn't spread much either. But once people began living together in cities, it created a new environment for bedbugs. The study states that the bugs started mating with each other more, their numbers grew quickly, and they adapted to life in cities. The researchers also hypothesised that bed bugs were one of the first pests to adjust to city life and were likely the first insect pests to live in urban areas. Other animals became connected to city life much later. German cockroaches, for instance, started living closely with humans around 2,100 years ago, and black rats around 5,000 years ago. Mark Ravinet, an evolutionary biologist from the University of Oslo in Norway, who said that these findings showed that bedbugs can help scientists learn how species adapt to live with humans. He said the study was important for understanding how quickly animals can adjust to human environments and what changes they make in order to survive.
Observer
2 days ago
- Science
- Observer
Tools made of whale bones reveal inventiveness of prehistoric people
Artifacts found at archeological sites in France and Spain along the Bay of Biscay shoreline show that humans have been crafting tools from whale bones since more than 20,000 years ago, illustrating anew the resourcefulness of prehistoric people. The tools, primarily hunting implements such as projectile points, were fashioned from the bones of at least five species of large whales, the researchers said. Bones from sperm whales were the most abundant, followed by fin whales, gray whales, right or bowhead whales - two species indistinguishable with the analytical method used in the study - and blue whales. With seafaring capabilities by humans not developing until thousands of years later, the Ice Age hunter-gatherers who made these implements would have been unable to actually hunt whales for their resources in the Bay of Biscay, a gulf of the Atlantic Ocean. "These whales were likely opportunistically acquired from stranded animals or drifted carcasses, rather than actively hunted," said biomolecular archaeologist Krista McGrath of the Autonomous University of Barcelona, co-lead author of the study published in the journal Nature Communications, opens new tab. "The majority of the bones were identified from offshore, deep-water species - such as sperm whale and fin whale - which would have been very difficult to hunt for these prehistoric groups. And there is no evidence from this time period that they had the level of technology that active hunting would have required, like seafaring boats," McGrath said. The 71 whale bone artifacts analyzed by the researchers were found at 27 cave or rock shelter sites. The two oldest ones, both from the bones of fin whales, came from the Spanish Cantabrian sites of Rascaño, dating to about 20,500 years ago, and El Juyo, dating to about 19,800 years ago. The rough age range of the artifacts was from 14,000 years old to more than 20,000 years old, but most were 16,000 to 17,500 years old. The main raw material used to manufacture spear points at the time was antler from reindeer or red deer because it is less brittle and more pliable than land mammal bone. But whale bone offered some advantages, including its large dimensions, with some of the projectile points measuring more than 16 inches (40 cm) long, a size difficult to achieve using antler. "They can be very long and thick, and were probably hafted on spear-style projectiles rather than arrows. They are usually found as fragments, many of which bear fractures related to use, and they were most likely used to hunt the main game animals of the time - reindeer and red deer, horse, bison and ibex," said archaeologist and study co-senior author Jean-Marc Pétillon of the French National Centre for Scientific Research. Bone tools were used by members of the human evolutionary lineage dating back far before our species Homo sapiens emerged more than 300,000 years ago in Africa. The artifacts examined in this study pushed back the oldest-known use of whale bones for toolmaking by 1,000 to 2,000 years. The objects were previously discovered at the various sites and kept in museum collections. The researchers used modern analytical techniques to determine the species from which the bones came and the age of the artifacts. Humans living in this period of prehistory generally were inland hunters, obtaining most of their subsistence needs from the hunting of large hoofed mammals, Pétillon said. The new findings enhance the understanding of their exploitation of seashore resources, Pétillon added. Previous research had shown that Ice Age people gathered seashells, hunted seabirds and fished for marine fishes as a complement to meat from terrestrial animals. "The new findings tell us that these prehistoric groups were likely very well adapted to these coastal environments, and very likely had deep local ecological knowledge and understanding of their coastal habitats," McGrath said. "Whale bones would have been for more than just making tools. There is evidence for their use as fuel as well - the bones contain large amounts of oil - among other things. And the rest of the whale would also certainly have been used – teeth or baleen depending on the species, meat, skin. A single whale provides a lot of resources," McGrath said.—Reuters
Time of India
2 days ago
- Science
- Time of India
Mammoths vs. Elephants: A detailed comparison on the basis of characteristics, habitat and more
Source: Wikipedia Mammoths and elephants are two of the most fascinating and iconic members of the elephant family and they even share many similarities yet exhibit distinct differences. While elephants roam the Earth today, mammoths lived thousands of years ago during the Ice Age and are now extinct. Comparing these prehistoric giants with their modern relatives helps us understand how they adapted to different environments, their physical traits, behavior and their place in natural history. This comparison sheds light on the characteristics, habitat,survival and challenges faced by these remarkable creatures. How mammoths and elephants are different Aspect Mammoths Elephants Physical Characteristics Thick, shaggy fur; long, spiraled tusks; stocky body with fat hump; smaller ears; built for cold Sparse hair; straighter tusks; larger ears (especially African elephants); adapted to warm climates Species & Classification Genus Mammuthus; extinct; famous species: woolly mammoth (Mammuthus primigenius) Genus Elephas (Asian elephants) and Loxodonta (African elephants); three living species; endangered Habitat & Distribution Lived in Ice Age tundras & grasslands of North America, Europe, northern Asia; cold, icy climates Found in sub-Saharan Africa (savannas, forests, deserts) and South/Southeast Asia (tropical forests) Diet & Behavior Herbivores; grazed cold-tolerant plants; lived in matriarchal herds; used trunks for feeding & social interaction Herbivores; varied diet including fruits and bark; matriarchal herds; behaviors include dust bathing and mud wallowing Extinction & Conservation Extinct ~4,000 years ago due to climate change and hunting; cold adaptations lost value Still alive; threatened by habitat loss, poaching, human conflict; conservation efforts ongoing Evolutionary Relationship Shared common ancestor with elephants; diverged millions of years ago; closely related genetically Closest living relatives to mammoths; evolutionary adaptations to warm climates Cultural & Historical Significance Featured in Ice Age art; used for tools and food by early humans Symbolize strength, wisdom, royalty; important in religion, folklore, warfare, and labor historically Adaptations Thick fur, fat layer, curved tusks for snow digging, smaller ears to reduce heat loss Large ears for heat dissipation, sparse hair, versatile trunks, strong legs and tusks adapted to warm environments Mammoths vs elephants: Key differences Physical characteristics Mammoths and elephants share similar body structures but have notable differences. Mammoths were generally covered in thick, shaggy fur to survive Ice Age cold, while elephants have sparse hair suited for warmer climates. Mammoths had long, curved tusks that spiraled more dramatically than elephants' straighter tusks. Their bodies were stockier with a hump of fat on their backs for insulation. In contrast, elephants have larger ears, especially African elephants, which help regulate body temperature. Both species have trunks and large, sturdy legs but mammoths were built to endure freezing conditions, whereas elephants are adapted to tropical and savanna environments. Species and classification Mammoths and elephants both belong to the family Elephantidae, making them close relatives. Mammoths fall under the genus Mammuthus, with the most famous species being the woolly mammoth, which lived during the Ice Age. In contrast, modern elephants belong to the genus Elephas which are Asian elephants and Loxodonta which are African elephants. There are three main living species: the African bush elephant, the African forest elephant,and the Asian elephant. While mammoths are extinct, elephants continue to survive but many species face threats and are considered vulnerable or endangered. Habitat and distribution Mammoths primarily lived in cold and icy environments during the Ice Age, such as the vast tundras and grasslands of North America, Europe and northern Asia. Their thick fur and fat helped them survive harsh, freezing climates. In contrast, modern elephants inhabit warmer regions. African elephants are found across sub-Saharan Africa in savannas, forests, and deserts while Asian elephants live in tropical forests and grasslands across South and Southeast Asia. Unlike mammoths, which are extinct, elephants still roam diverse habitats but face challenges due to habitat loss and human activity. Diet and behavior Both mammoths and elephants were herbivores, primarily feeding on grasses, leaves, shrubs, and bark. Mammoths grazed on tough and cold-tolerant plants and were found in Ice Age tundras while elephants consume a wide variety of vegetation depending on their habitat, including fruits and tree bark. Socially, both animals lived in herds led by a matriarch, showing strong family bonds and complex communication. They used their trunks for feeding, drinking and social interaction. While mammoths adapted to harsh and cold environments, elephants display behaviors suited to warmer climates, such as dust bathing and mud wallowing to regulate body temperature. Extinction and conservation Mammoths went extinct around 4,000 years ago, primarily due to climate change at the end of the Ice Age and hunting by early humans. Their cold-adapted traits became less useful as temperatures rose, leading to habitat loss. In contrast, elephants are still alive today but face serious threats from habitat destruction, poaching for ivory and human-wildlife conflict. Conservation efforts focus on protecting elephant habitats, enforcing anti-poaching laws and supporting breeding programs to prevent their decline. While mammoths are gone, the survival of elephants depends heavily on global conservation actions to ensure these majestic creatures do not face the same fate. Evolutionary relationship Mammoths and elephants share a common ancestor and belong to the same family that is Elephantidae. Their evolutionary paths diverged millions of years ago, with mammoths adapting to cold Ice Age environments while elephants evolved to thrive in warmer climates. Despite differences in appearance and habitat, their genetic makeup remains closely related. Modern elephants are considered the closest living relatives of mammoths. Advances in DNA analysis have even allowed scientists to study mammoth genes, offering insights into how these species evolved and adapted to their environments over time. Cultural and historical significance Mammoths have fascinated humans for thousands of years, appearing in prehistoric cave paintings and ancient tools made from their bones and tusks. They played a key role in Ice Age cultures as a source of food, materials, and inspiration. Elephants have held cultural importance across many civilizations- symbolizing strength, wisdom and royalty in cultures from Africa to Asia. They feature prominently in religious ceremonies, folklore and art. Historically, elephants were also used in warfare and labor. Both animals continue to influence human culture, reminding us of the deep connections between wildlife and human history. Adaptations Mammoths were well adapted to cold Ice Age environments with thick, shaggy fur and a dense layer of fat to keep warm. Their long and curved tusks helped them dig through snow to reach vegetation. They also had smaller ears compared to elephants, reducing heat loss. Elephants, on the other hand, are adapted to warmer climates. They have large ears that help dissipate heat and sparse hair to keep cool. Their trunks are highly versatile for feeding, drinking, and social interaction. Both species developed strong legs and tusks suited to their environments, showing how evolution shaped them for survival in different conditions. Also read: King Cobra vs Eastern Indigo Snake: Who will win a fight between these two venomous creatures
Yahoo
3 days ago
- General
- Yahoo
Archaeolgists Make Surprising Discovery About Ice Age Hunting Tools
A recent study published in Nature Communications has found the first-known evidence of human beings manufacturing tools out of whale bones. Throughout 26 rock shelters and caves within northern Spain and southwestern France, researchers found 173 bone specimens, including 83 tools and 90 fragments. An analysis using Zooarchaeology by Mass Spectrometry (ZooMS) found that 131 of those specimens were whale bones belonging to sperm whales, gray whales, blue whales, fin whales, and right or bowhead whales.'Our study reveals that the bones came from at least five species of large whales, the oldest of which date to approximately 19,000–20,000 years ago,' lead author Jean-Marc Pétillon said in a press release. 'These represent some of the earliest known evidence of humans using whale remains as tools.' The bones bear little sign of water wear, which means they were likely harvested from animals which had washed up on the shore rather than deep-sea hunting. Many of the tools were dated between 17,500 and 16,000 years ago, though the oldest specimen found dates back 20,000 years. In particular, the bones of sperm whales were found to be particularly popular in fashioning spears and other hunting instruments. Over 40 percent of projectile points and 73 percent of foreshafts analyzed were created from sperm whale bones.'What was more surprising to me, as an archaeologist more accustomed to terrestrial faunas, was that these whale species remained the same despite the great environmental difference between the Late Pleistocene and today,' Pétillon told Popular Science. 'In the same period, continental faunas are very different: the ungulates hunted include reindeer, saiga antelopes, bison, etc., all disappeared from Western Europe today.'Pétillon believes ancient people came from far and wide to scavenge whale bones and other parts when they washed up on shore. With further research, he and his team hope to deduce why tools constructed from whale bone declined so rapidly 16,000 years ago. 'The news of a stranding travels fast first, because it smells a lot [from a] long distance away, so people would concentrate from quite far,' Pétillon told New Scientist. 'So, it might not have been the main driver of people going to the seashore, but when that happened, it probably had an influence on the movement of the people who probably changed their planned pattern of movement to go there.'Archaeolgists Make Surprising Discovery About Ice Age Hunting Tools first appeared on Men's Journal on May 30, 2025
IOL News
4 days ago
- Science
- IOL News
Early whalebone tools show inventiveness of prehistoric people
A large projectile point made of gray whale bone from the Duruthy rockshelter, dated between 18 000 and 17 500 years ago, is pictured in Landes, France. Image: Alexandre Lefebvre / REUTERS Will Dunham Artifacts found at archeological sites in France and Spain along the Bay of Biscay shoreline show that humans have been crafting tools from whale bones since more than 20 000 years ago, illustrating anew the resourcefulness of prehistoric people. The tools, primarily hunting implements such as projectile points, were fashioned from the bones of at least five species of large whales, the researchers said. Bones from sperm whales were the most abundant, followed by fin whales, gray whales, right or bowhead whales - two species indistinguishable with the analytical method used in the study - and blue whales. With seafaring capabilities by humans not developing until thousands of years later, the Ice Age hunter-gatherers who made these implements would have been unable to actually hunt whales for their resources in the Bay of Biscay, a gulf of the Atlantic Ocean. "These whales were likely opportunistically acquired from stranded animals or drifted carcasses, rather than actively hunted," said biomolecular archaeologist Krista McGrath of the Autonomous University of Barcelona, co-lead author of the study published in the journal Nature Communications. "The majority of the bones were identified from offshore, deep-water species - such as sperm whale and fin whale - which would have been very difficult to hunt for these prehistoric groups. And there is no evidence from this time period that they had the level of technology that active hunting would have required, like seafaring boats," McGrath said. The 71 whale bone artifacts analyzed by the researchers were found at 27 cave or rock shelter sites. The two oldest ones, both from the bones of fin whales, came from the Spanish Cantabrian sites of Rascaño, dating to about 20 500 years ago, and El Juyo, dating to about 19 800 years ago. The rough age range of the artifacts was from 14 000 years old to more than 20 000 years old, but most were 16 000 to 17 500 years old. The main raw material used to manufacture spear points at the time was antler from reindeer or red deer because it is less brittle and more pliable than land mammal bone. But whale bone offered some advantages, including its large dimensions, with some of the projectile points measuring more than 40 cm long, a size difficult to achieve using antler. "They can be very long and thick, and were probably hafted on spear-style projectiles rather than arrows. They are usually found as fragments, many of which bear fractures related to use, and they were most likely used to hunt the main game animals of the time - reindeer and red deer, horse, bison and ibex," said archaeologist and study co-senior author Jean-Marc Pétillon of the French National Centre for Scientific Research. Bone tools were used by members of the human evolutionary lineage dating back far before our species Homo sapiens emerged more than 300,000 years ago in Africa. The artifacts examined in this study pushed back the oldest-known use of whale bones for tool making by 1 000 to 2 000 years. The objects were previously discovered at the various sites and kept in museum collections. The researchers used modern analytical techniques to determine the species from which the bones came and the age of the artifacts. Humans living in this period of prehistory generally were inland hunters, obtaining most of their subsistence needs from the hunting of large hoofed mammals, Pétillon said. The new findings enhance the understanding of their exploitation of seashore resources, Pétillon added. Previous research had shown that Ice Age people gathered seashells, hunted seabirds and fished for marine fishes as a complement to meat from terrestrial animals. "The new findings tell us that these prehistoric groups were likely very well adapted to these coastal environments, and very likely had deep local ecological knowledge and understanding of their coastal habitats," McGrath said. "Whale bones would have been for more than just making tools. There is evidence for their use as fuel as well - the bones contain large amounts of oil - among other things. And the rest of the whale would also certainly have been used – teeth or baleen depending on the species, meat, skin. A single whale provides a lot of resources," McGrath said. | Reuters
