Megadrought caused mega biodiversity loss

Researchers at CSIRO, Australia's national science agency, have painstakingly reconstructed the nation's 'once in a century drought' in the early 1900s, revealing that it caused mass ecosystem collapse and dramatic declines ...

Native American populations descend from three key migrations

Scientists have found that Native American populations — from Canada to the southern tip of Chile — arose from at least three migrations, with the majority descended entirely from a single group of First American ...

Delayed legacy of invasive species

(PhysOrg.com) -- A team of researchers in Europe has urged governments to introduce tougher controls of all international trade that could result in the introduction of non-native species. They say the full impact of alien ...

Skulls show New World was settled twice: study

Two distinct groups from Asia settled in the New World and not one single migration as suggested by previous genetic studies, experts said Monday after comparing the skulls of early Americans.

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