Scientists have identified an almost complete skeleton of a 4.8-meter-long dolphin ancestor that lived in what is now South Carolina during the Oligocene epoch about 25 million years ago. This ‘dolphin’ was the first known echolocation apex predator: in addition to its large size, it would have had large, tusk-like …
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Today, flowering plants (or angiosperms) represent about four-fifths of all green plants on Earth, but for billions of years they did not exist at all. Biologists have now been able to fully record the rapid increase in angiosperms in the past 140 million years. A recently released ‘time tree’ of …
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A new guide from the Centers for Disease Control and Prevention estimates that 40 percent of people infected with COVID-19 are asymptomatic and the likelihood of transmission from people without symptoms is 75 percent. In an updated guide also reported by CNN, the agency expanded its “best current estimate” based …
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When you go out and look at the sky on a clear night, it seems like nothing else could be so serene and peaceful. But many of those seemingly peaceful stars are evidence of a troubled history, and now we are learning to uncover their secrets. Using data from the …
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Scientists in Italy are investigating the mysterious appearance of pink glacial ice in the Alps, caused by algae that accelerate the effects of climate change. There is debate about the origin of the algae, but Biagio Di Mauro, from the National Research Council of Italy, said the pink snow seen …
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