Latest news with #StuartSumida
CBC
15-05-2025
- Science
- CBC
Oldest fossil footprints from reptile found in Australia
Scientists in Australia have identified the oldest known fossil footprints of a reptile-like animal, dated to around 350 million years ago. The discovery suggests that after the first animals emerged from the ocean around 400 million years ago, they evolved the ability to live exclusively on land much faster than previously assumed. "We had thought the transition from fin to limb took much longer," said California State University paleontologist Stuart Sumida, who was not involved in the new research. Previously the earliest known reptile footprints, found in Canada, were dated to 318 million years ago. The ancient footprints from Australia were found on a slab of sandstone recovered near Melbourne and show reptile-like feet with long toes and hooked claws. Scientists estimate the animal was about 80 centimetres long and may have resembled a modern monitor lizard. The findings were published Wednesday in Nature. Earliest animal with claws The hooked claws are a crucial identification clue, said study co-author and paleontologist Per Ahlberg at Uppsala University in Sweden. "It's a walking animal," he said. Only animals that evolved to live solely on land ever developed claws. The earliest vertebrates — fish and amphibians — never developed hard nails and remained dependent on watery environments to lay eggs and reproduce. But the branch of the evolutionary tree that led to modern reptiles, birds and mammals — known as amniotes — developed feet with nails or claws fit for walking on hard ground. "This is the earliest evidence we've ever seen of an animal with claws," said Sumida. At the time the ancient reptile lived, the region was hot and steamy and vast forests began to cover the planet. Australia was part of the supercontinent Gondwana. The fossil footprints record a series of events in one day, Ahlberg said. One reptile scampered across the ground before a light rain fell. Some raindrop dimples partially obscured its trackways. Then two more reptiles ran by in the opposite direction before the ground hardened and was covered in sediment. Fossil "trackways are beautiful because they tell you how something lived, not just what something looked like," said co-author John Long, a paleontologist at Flinders University in Australia.
The Independent
14-05-2025
- Science
- The Independent
A new discovery is rewriting the history of evolution by millions of years
Scientists in Australia have unearthed the oldest known fossil footprints of a reptile -like creature, pushing back the timeline of terrestrial life by millions of years. The prints, dating back approximately 350 million years, suggest animals transitioned from aquatic to fully terrestrial life far more rapidly than previously believed. This discovery surpasses the prior record held by footprints found in Canada, dated to 318 million years ago. The finding challenges existing theories about the evolutionary journey from fin to limb. "We had thought the transition from fin to limb took much longer," commented California State University paleontologist Stuart Sumida, who was not involved in the study. The emergence of the first land-dwelling animals is estimated to have occurred around 400 million years ago. This new evidence significantly shortens the assumed timeframe for the development of fully terrestrial locomotion in vertebrates. The ancient footprints from Australia were found on a slab of sandstone recovered near Melbourne and show reptile-like feet with long toes and hooked claws. Scientists estimate the animal was about 2 1/2 feet (80 centimeters) long and may have resembled a modern monitor lizard. The findings were published Wednesday in Nature. The hooked claws are a crucial identification clue, said study co-author and paleontologist Per Ahlberg at Uppsala University in Sweden. 'It's a walking animal,' he said. Only animals that evolved to live solely on land ever developed claws. The earliest vertebrates -- fish and amphibians – never developed hard nails and remained dependent on watery environments to lay eggs and reproduce. But the branch of the evolutionary tree that led to modern reptiles, birds and mammals – known as amniotes – developed feet with nails or claws fit for walking on hard ground. 'This is the earliest evidence we've ever seen of an animal with claws,' said Sumida. At the time the ancient reptile lived, the region was hot and steamy and vast forests began to cover the planet. Australia was part of the supercontinent Gondwana. The fossil footprints record a series of events in one day, Ahlberg said. One reptile scampered across the ground before a light rain fell. Some raindrop dimples partially obscured its trackways. Then two more reptiles ran by in the opposite direction before the ground hardened and was covered in sediment. Fossil 'trackways are beautiful because they tell you how something lived, not just what something looked like,' said co-author John Long, a paleontologist at Flinders University in Australia.
CTV News
14-05-2025
- Science
- CTV News
How ancient reptile footprints are rewriting the history of when animals evolved to live on land
This image provided by Prof. Per Erik Ahlberg shows an artist's illustration of the possible appearance of a reptile-like creature that lived around 350 million years ago in what's now Australia. The animal was around two and a half feet long and its feet had long fingers and claws, which are visible in newly discovered fossil footprints. (Marcin Ambrozik/Prof. Per Erik Ahlberg via AP) WASHINGTON — Scientists in Australia have identified the oldest known fossil footprints of a reptile-like animal, dated to around 350 million years ago. The discovery suggests that after the first animals emerged from the ocean around 400 million years ago, they evolved the ability to live exclusively on land much faster than previously assumed. 'We had thought the transition from fin to limb took much longer,' said California State University paleontologist Stuart Sumida, who was not involved in the new research. Previously the earliest known reptile footprints, found in Canada, were dated to 318 million years ago. The ancient footprints from Australia were found on a slab of sandstone recovered near Melbourne and show reptile-like feet with long toes and hooked claws. Scientists estimate the animal was about 2 1/2 feet (80 centimeters) long and may have resembled a modern monitor lizard. The findings were published Wednesday in Nature. The hooked claws are a crucial identification clue, said study co-author and paleontologist Per Ahlberg at Uppsala University in Sweden. 'It's a walking animal,' he said. Only animals that evolved to live solely on land ever developed claws. The earliest vertebrates -- fish and amphibians – never developed hard nails and remained dependent on watery environments to lay eggs and reproduce. But the branch of the evolutionary tree that led to modern reptiles, birds and mammals – known as amniotes -- developed feet with nails or claws fit for walking on hard ground. 'This is the earliest evidence we've ever seen of an animal with claws,' said Sumida. At the time the ancient reptile lived, the region was hot and steamy and vast forests began to cover the planet. Australia was part of the supercontinent Gondwana. The fossil footprints record a series of events in one day, Ahlberg said. One reptile scampered across the ground before a light rain fell. Some raindrop dimples partially obscured its trackways. Then two more reptiles ran by in the opposite direction before the ground hardened and was covered in sediment. Fossil 'trackways are beautiful because they tell you how something lived, not just what something looked like,' said co-author John Long, a paleontologist at Flinders University in Australia. ___ The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute's Science and Educational Media Group and the Robert Wood Johnson Foundation. The AP is solely responsible for all content. Christina Larson, The Associated Press
The Independent
14-05-2025
- Science
- The Independent
How ancient reptile footprints are rewriting the history of when animals evolved to live on land
Scientists in Australia have identified the oldest known fossil footprints of a reptile-like animal, dated to around 350 million years ago. The discovery suggests that after the first animals emerged from the ocean around 400 million years ago, they evolved the ability to live exclusively on land much faster than previously assumed. 'We had thought the transition from fin to limb took much longer,' said California State University paleontologist Stuart Sumida, who was not involved in the new research. Previously the earliest known reptile footprints, found in Canada, were dated to 318 million years ago. The ancient footprints from Australia were found on a slab of sandstone recovered near Melbourne and show reptile-like feet with long toes and hooked claws. Scientists estimate the animal was about 2 1/2 feet (80 centimeters) long and may have resembled a modern monitor lizard. The findings were published Wednesday in Nature. The hooked claws are a crucial identification clue, said study co-author and paleontologist Per Ahlberg at Uppsala University in Sweden. 'It's a walking animal,' he said. Only animals that evolved to live solely on land ever developed claws. The earliest vertebrates -- fish and amphibians – never developed hard nails and remained dependent on watery environments to lay eggs and reproduce. But the branch of the evolutionary tree that led to modern reptiles, birds and mammals – known as amniotes -- developed feet with nails or claws fit for walking on hard ground. 'This is the earliest evidence we've ever seen of an animal with claws,' said Sumida. At the time the ancient reptile lived, the region was hot and steamy and vast forests began to cover the planet. Australia was part of the supercontinent Gondwana. The fossil footprints record a series of events in one day, Ahlberg said. One reptile scampered across the ground before a light rain fell. Some raindrop dimples partially obscured its trackways. Then two more reptiles ran by in the opposite direction before the ground hardened and was covered in sediment. Fossil 'trackways are beautiful because they tell you how something lived, not just what something looked like,' said co-author John Long, a paleontologist at Flinders University in Australia. ___ The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute's Science and Educational Media Group and the Robert Wood Johnson Foundation. The AP is solely responsible for all content.
Associated Press
14-05-2025
- Science
- Associated Press
How ancient reptile footprints are rewriting the history of when animals evolved to live on land
WASHINGTON (AP) — Scientists in Australia have identified the oldest known fossil footprints of a reptile-like animal, dated to around 350 million years ago. The discovery suggests that after the first animals emerged from the ocean around 400 million years ago, they evolved the ability to live exclusively on land much faster than previously assumed. 'We had thought the transition from fin to limb took much longer,' said California State University paleontologist Stuart Sumida, who was not involved in the new research. Previously the earliest known reptile footprints, found in Canada, were dated to 318 million years ago. The ancient footprints from Australia were found on a slab of sandstone recovered near Melbourne and show reptile-like feet with long toes and hooked claws. Scientists estimate the animal was about 2 1/2 feet (80 centimeters) long and may have resembled a modern monitor lizard. The findings were published Wednesday in Nature. The hooked claws are a crucial identification clue, said study co-author and paleontologist Per Ahlberg at Uppsala University in Sweden. 'It's a walking animal,' he said. Only animals that evolved to live solely on land ever developed claws. The earliest vertebrates -- fish and amphibians – never developed hard nails and remained dependent on watery environments to lay eggs and reproduce. But the branch of the evolutionary tree that led to modern reptiles, birds and mammals – known as amniotes -- developed feet with nails or claws fit for walking on hard ground. 'This is the earliest evidence we've ever seen of an animal with claws,' said Sumida. At the time the ancient reptile lived, the region was hot and steamy and vast forests began to cover the planet. Australia was part of the supercontinent Gondwana. The fossil footprints record a series of events in one day, Ahlberg said. One reptile scampered across the ground before a light rain fell. Some raindrop dimples partially obscured its trackways. Then two more reptiles ran by in the opposite direction before the ground hardened and was covered in sediment. Fossil 'trackways are beautiful because they tell you how something lived, not just what something looked like,' said co-author John Long, a paleontologist at Flinders University in Australia. ___ The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute's Science and Educational Media Group and the Robert Wood Johnson Foundation. The AP is solely responsible for all content.
