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Early human ancestors had lots of company, fossils reveal

What everyone is saying about NASA's Mars rover landing

Is global warming behind the recent heat waves?

Curiosity Mars rover phones home to say it's doing well, is beginning surface mission

Opinion

Why America's 'hacker generation' can thrive as teachers

NASA showered with praise over Curiosity Mars rover landing

Janice Voss, shuttle astronaut, remembered for NASA contributions

Jessica Ennis and the night Britain's Olympics all became worth it

How will the Curiosity Mars rover phone home?

How do elephants make such low sounds? At last, scientists figure it out.