New fossils recast a flat-faced oddity as a star species in the first chapter of the human story—perhaps even as our oldest known truly human ancestor. At the least, the fossils confirm that at least three different human species inhabited the same Kenyan neighborhood at the dawn of humanity, according to a new study led…
Fist pumps, hands in the air and jumping up and down, seen at every event at the Olympics, turn out to be the same across all cultures and likely have their roots in non-human primate displays. When Olympic athletes like Michael Phelps, Gabby Douglas and Usain Bolt celebrate their wins, they are displaying a declaration…
A new genetic map paints a comprehensive picture of the 2,000 or so years in which different Jewish groups migrated across the globe, with some becoming genetically isolated units while others seemed to mix and mingle more. The findings allow researchers to trace the diaspora, or the historical migration, of the Jews, which began in…
After decades of digging, paleoanthropologists looking for fossilized human bones have established a reasonably clear picture: Modern humans arose in Africa some 200,000 years ago and all archaic species of humans then disappeared, surviving only outside Africa, as did the Neanderthals in Europe. Geneticists studying DNA now say that, to the contrary, a previously unknown…
From David Barash’s post, The Hare, the Tortoise, and the Aurora Madman, in reaction to the tragedy in Colorado, from The Chronicle of Higher Education’s Brainstorm blog: Far more than any other critter, we Homo saps are stuck between two worlds, biological evolution and cultural evolution. The former is a Darwinian, genetic process, necessarily slow…
Ever since Darwin first published The Origin of the Species, scientists have been striving to identify a last universal common ancestor of all living species. Paleontological, biochemical, and genomic studies have produced conflicting versions of the evolutionary tree. Now a team of researchers has developed a novel method to search the vast archives of known…
The famous biologist Stephen J. Gould once asked: If we rerun the tape of life, would the outcome of evolution be the same? For years, scientists have questioned whether evolution is predictable, or whether chance events make such predictability unlikely. A study published online in the Proceedings of the National Academy of Sciences finds that…
A race to unlock genetic clues behind living to 100 is set to begin next year, after a US team announced it will compete for the $10 million Genomics X Prize. Genetic entrepreneur Jonathan Rothberg is entering the challenge to identify genes linked to a long, healthy life. His team – and any other contenders…
Given the dramatic difference in the size and sequence of the human X and Y chromosomes, it’s hard to imagine that they were once a perfect matching pair. But in fact all sex chromosomes start out that way. New research published in Science examines the early phase of sex chromosome evolution in a strain of…
Polar and brown bears diverged between 4 million and 5 million years ago, but they continued to interbreed when the climate warmed. Now, there is evidence that it is happening again.