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Scientists estimate that the first eukaryotes evolved about 2 billion years ago, in one of the greatest transitions in the history of life. But there is little evidence of this momentous event, no missing link that helps researchers trace the evolution of life from simple microbes to eukaryotes. On Wednesday, a team of scientists announced the discovery of just such a transitional form.

Experimental archaeology involves moderns crafting Stone Age tools by chipping away at rocks. One reason is to get at the question of what role toolmaking may have played in brain evolution, given the demands this task places on both mental faculties and motor skills.

Rap artist Baba Brinkman doesn't argue for science over religion; he uses evolutionary science to explain religion's origins, function and development.

Being on the way to becoming a new species isn’t the same thing as actually speciating. Actual speciation without isolation is quite rare, and even the Santa Cruz Island jays have not actually speciated, and may never even do so. But the implications for long-held evolutionary principles are intriguing. Darwin’s famous Galapagos finches certainly prove that isolation leads to speciation, but now it may be that isolation isn’t always necessary to get species to diverge.

Neanderthals divided some of their tasks according to their sex. A new study analyzed 99 teeth of 19 individuals from three different sites (El Sidron, in Asturias - Spain, L'Hortus in France, and Spy in Belgium), reveals that the dental grooves in the female fossils follow the same pattern, different to that found in male individuals.

Jon Stewart challenges Fox to a lie-off. Beethoven and the epigenome. The evolution of religion. Men in skirts protest violence against women in Turkey. 'Chuy' Garcia for mayor of Chicago.

We are all Roy Batty. All of our moments will be lost, like tears in rain…but weren’t they extraordinary moments?

An evolutionary arms race keeps humans and bacteria right where they started.