
Pics: Two shipwrecks confirmed as slave ships by archaeologists
According to Fox News, the remains of the two ships, known as the Fridericus Quartus and Christianus Quintus, have been located underwater off the coast of the Cahuita National Park in Costa Rica for more than 300 years. The outlet noted that the two ships were believed to have been pirate ships prior to a recent discovery.
Fox News reported that David John Gregory, an archaeologist with the National Museum of Denmark, told the outlet that the ships are now believed to have been carrying between 600 and 700 African slaves and roughly 100 crew members when the ships sank.
'When the ships were abandoned on the coast of present-day Costa Rica, almost all of the enslaved were released on the forested coast except for about 20 people, who were forced onboard smaller vessels heading for the nearby Spanish town of Portobello,' Gregory said. '[Fridericus Quartus] was set on fire by its crew, while the other, Christianus Quintus, was set free from its moorings and soon after stranded on the coast.'
The National Museum of Denmark announced last month that new information regarding the Fridericus Quartus and Christianus Quintus had been revealed by 'scientific analyses from an underwater excavation in 2023, when marine archaeologists from the National Museum of Denmark and the Viking Ship Museum took samples of wood from one of the wrecks and from the bricks that were part of the cargo more than 300 years ago.'
READ MORE: Pics: Surprising WWII shipwreck finds revealed
Gregory told Fox News that the excavation was 'minimal' and that his team surveyed approximately 21 square feet around one of the ships to 'obtain samples of the ship's timber.'
According to the National Museum of Denmark, archaeologists have been able to use dendrochronological technology to determine that the wood from the ships was from the 17th century.
The National Museum of Denmark explained, 'The timbers originate in the western part of the Baltic Sea, an area that encompasses the northeastern German province of Mecklenburg, as well as Schleswig-Holstein, Denmark and Scania — and that the tree was cut down sometime during the years 1690-1695.'
The museum added that the 'charred and sooty' wood confirmed historical sources that claimed one of the ships had been 'set ablaze.'
'The analyses are very convincing and we no longer have any doubts that these are the wrecks of the two Danish slave ships,' Gregory said. 'The bricks are Danish and the same goes for the timbers, which are additionally charred and sooty from a fire. This fits perfectly with the historical accounts stating that one of the ships burnt.'
Pictures of the remains of the two Danish slave ships have been shared on X, formerly Twitter.
⚓📜 Archaeologist uncovers chilling secrets of wrecked slave ships off Costa Rica. David John Gregory reveals new findings on Fridericus Quartus & Christianus Quintus, 2 Danish slave ships lost centuries ago. The vessels, stranded on coast, carried enslaved Africans on brutal… pic.twitter.com/h1IIyBoENf — GoodMorningRooster (@RoosterGM) May 6, 2025
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National Geographic
25 minutes ago
- National Geographic
Plate Tectonics
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Boston Globe
2 days ago
- Boston Globe
Spain's old ways may show how to keep cool
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UPI
3 days ago
- UPI
Watch: 'Astonishing' video shows human embryo implanting in real time
1 of 4 | A human embryo is shown implanting itself inside a simulated uterine wall in an image taken from the first real-time video of the process ever recorded. Spanish researchers say they hope their video will lead to a deeper understanding of infertility. Photo courtesy Institute for Bioengineering of Catalonia Aug. 11 (UPI) -- A team of Spanish researchers announced Friday they have for the first time recorded video of a human embryo implanting itself in a simulated uterine wall, revealing never-before-seen details of how 5-day-old embryos carry out the mysterious process. Using advanced microscopy techniques allowing the scientists to record the human embryo in full color and 3D, the "astonishing" videos provide the first-ever, real-time glimpse of the implantation process and have provided key insights into how it actually works, they said. Researchers from the Institute for Bioengineering of Catalonia and Dexeus University Hospital in Barcelona, Spain, said the videos reveal for the first time that embryos exert "considerable force" and employ digging traction as they "invade" the uterine tissue, becoming completely integrated with it. The findings, published in journal Science Advances, found crucial differences between how mouse and human embryos move in connecting to the uterus wall, the authors said. An "ex vivo" platform they developed using an artificial uterine matrix made of gel and collagen which allows for implantation outside of a human uterus made the videos possible. The system could have a "significant impact" on efforts to counter infertility and help those who are unable to conceive naturally, they predicted. Failure of the implantation process is the main reason behind the relatively low effectiveness of assisted reproductive technologies, such as in-vitro fertilization, in which embryos are conceived in a lab and then transferred to the womb. Implantation occurs in only 25% to 30% of transferred embryos -- whether conceived in vivo or in-vitro -- with embryo quality cited as the most significant feature affecting implantation. "We've opened a window into a stage of development that was previously hidden," the co-authors said in a statement to UPI. "After Day 5, when an embryo has 100 to 200 cells, it must implant, but until now, doctors couldn't observe it again until an ultrasound weeks later. "With our system, we can test culture conditions or compounds that might improve implantation." For example, the scientists say they have already developed a protein supplement that can be used in clinics to enhance implantation rates, available through their spin-off company Serabiotics and in collaboration with the Spanish pharmaceutical major Grifols. "In short, this is a new tool for extending embryo observation and optimizing conditions for success," they said. The videos show a donated human embryo powerfully pulling on the uterine matrix and reshaping it as it goes, illustrating the importance of "optimal matrix displacement." Lead author Samuel Ojosnegros, principal investigator of IBEC's Bioengineering for Reproductive Health Group, said the initial real-time look at a human embryo implanting itself was a profound experience for him. "We had some experience making time-lapse movies of mouse embryos, but the first time we saw a human embryo implanting was truly astonishing," he said. "Everything was different, the size, the shape, the behavior. They were stronger, more forceful, digging a hole into the matrix in a remarkably invasive way. Every detail felt unique. "Watching it alive, in action, for the first time was absolutely mind-blowing." Embryo implantation is the "holy grail" of reproduction -- and unlike in the animal world, in humans it can be a problematic process, resulting in about 1 in 6 people around the world having trouble making a baby, noted Dr. Mark Trolice, a professor at the University of Central Florida College of Medicine and founder/director of The IVF Center, a full-service reproductive medicine clinic in Orlando. "Even though scientists have studied this for many years, they still do not fully understand how implantation works or what makes the uterus ready for an embryo," he told UPI. "One big mystery is why a woman's body can grow a baby made from sperm -- which is a 'foreign' tissue -- without rejecting it, as well as the ability to carry a donated egg." 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