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Oldest-known Homo sapiens fossils unearthe Newly-discovered fossils have shattered the notion that early humans emerged from a “Garden of Eden” region in east Africa 200,000 years ago, by strongly suggesting that our ancestors had already spread across the continent and taken major steps in their evolution some 100,000 years earlier. […]

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ISS and Endeavour seen from the Soyuz TMA spacecraft. / Credit: NASA This article was originally published at The Conversation. The publication contributed the article to Space.com’s Expert Voices: Op-Ed & Insights. When we think about the difficulties of colonising another planet, the last thing we probably worry about about […]