Diana Kwon Aug 6, Pangolins are poached for their scales and meat, leading researchers to develop a set of molecular tools to help track and mitigate the trade. Munyaradzi Makoni Aug 6, The pandemic and accompanying lockdowns have meant missing growing seasons and losing out on key data. As restrictions are partially lifted, researchers are adjusting to the new normal. Scientists digitally reconstructed the crushed skulls of Tanystropheus fossils, which revealed evidence that these reptiles were water-dwelling.
The strange The Scientists -- resembling a real-life Loch Ness Monster or a prehistoric crocodile crossed with a giraffe -- was first described in The Scientists first reconstructed in Palaeontologists have long known that the species once lived in Switzerland's Monte San Giorgio basin during the Middle Triassic period about million years ago. They also knew the bizarre-looking foot creature had a remarkably The Scientists neck, which at 10 feet long was half of its entire length.
This is the ultimate dinosaur road trip. But the remaining details surrounding the Tanystropheus remained fuzzy and have been much debated. Did these animals live on land or in the water? What did their young look like? And how did they interact with the other species in their environment? No one knew -- until now. Scientists used computed tomography CT scan technology to digitally reconstruct the crushed skulls of the fossils, which revealed evidence that these reptiles were water-dwelling, according to new research published today in Current Biology.
Read More. The researchers then moved on to combine human stem cells with cow and pig embryos chosen because of the relatively similar organ size among the species. Although their attempts The Scientists create a human-cow chimeric embryo were successful, The Scientists, the researchers decided to use pigs in follow-up experiments because the porcine animals were easier and cheaper to use than their bovine counterparts.
After implanting the resulting embryos back into pigs and letting them develop for three to four weeks, the researchers found that intermediate stem cells, which are slightly more developed than naive stem cells, led to better integration. But even with the intermediate cells, the number of human cells that were ultimately incorporated into the pig embryo was not very high, and many of the chimeric embryos were underdeveloped.
According to the authors, there are several reasons why the human-pig experiments did not work as well as the mouse-rat ones. For one, mice and rats are much more related to one another than are pigs and humans, and the rodents have much more similar gestation periods mice and rats differ by a few days, while pigs and humans are off by more than five months.
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