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“That would help to confirm that the result is reproducible, which is the cornerstone of any scientific claim.”The Al Wusta site in Saudi Arabia is surveyed and mapped.Archaeologists say that modern humans left Africa and lived here at least 85,000 years ago, when the region was a grassland with freshwater lakes and rivers. Team members also unearthed hundreds of animal fossils, including hippopotamuses, antelope and extinct species of African wild cattle.“These animals tell us that when humans were living there, it was not a desert,” said first author Huw Groucutt, an archaeologist at the University of Oxford.Supernova 2003gd was discovered on 12.82 June in the nearby spiral galaxy M74.From observations carried out using the ISIS spectrograph on the William Herschel Telescope, it was shown to be a type II–plateau (II-P) SN that was discovered about 87 days after explosion.But recent discoveries have poked holes in this story.Scientists have found what appear to be Homo sapiens teeth in Chinese caves that suggest humans arrived there much earlier.
In the Luna Cave, more teeth were uncovered among material that is believed to be between 130,000 and 70,000 years old.
It was that distinctive.”To be absolutely sure, members of the study team put the fossil in a CT scanner and took precise measurements of its shape.
Then they compared that shape with dozens of finger bones from humans, non-human primates and extinct hominin species.
But 90,000 years ago, there would have been a large river and an extensive fertile area that welcomed plants, animals and even humans.“Tracing the evolution and geographic dispersal of the human lineage is rather like connecting pitifully few dots on a vast three-dimensional grid of time and space,” Henry wrote in an essay that accompanies the study.
The fossilized finger bone represents “a very significant dot that provides a new reference point for human dispersal.”[email protected] me on Twitter @LATkarenkaplan and “like” Los Angeles Times Science & Health on Facebook. Scientists find signs of new brain cells in adults as old as 79Could this drug help the brain recover after a stroke?