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Getting a six-wheeled car-size rover safely onto the surface of the red planet? Daunting, sure. But NASA did it with Curiosity. Sending humans on a mission to Mars? That requires overcoming even more outlandish obstacles.

Our ancestors didn't walk alone: Neanderthals and other ancient peoples shared Earth with them tens of thousands of years ago. Now, using new technology, scientists have sequenced with high precision the genome of one of those close but little-known relatives: an extinct people known as the Denisovans, who lived in and around modern-day Siberia.

David's time on Earth had come to a temporary end — and he was taking his family with him. As soon as the rover Curiosity dropped onto the Martian surface on Aug. 5, David and hundreds of his fellow scientists and engineers at NASA's Jet Propulsion Laboratory switched from Earth time to Mars time.

NASA's Curiosity rover is making global headlines as it travels uncharted territory on Mars, and it will venture into new realms back on Earth this week when it premieres a new will.i.am song. The Black Eyed Peas rapper's tune "Reach For The Stars" will be broadcast live from the surface of Mars, via Curiosity, at 1 p.m. PST (4 p.m. EDT/2000 GMT) on Tuesday to a news conference at NASA's Jet Propulsion Laboratory in Pasadena, California, the organization said in a statement on Monday.

The mission team also unveiled today a stunning 360-degree panorama of Curiosity's Gale Crater landing site, showing in crisp detail some of the landforms scientists want the six-wheeled robot to explore.

Scientists have found three well preserved ancient insects frozen in amber - and time - in what is Earth's oldest bug trap. The discoveries of amber-encased insects in Italy may sound like something out of "Jurassic Park" but these bugs are even older than that. They are about 230 million years old, which puts them in the Triassic time period, and about 100 million years older than what had been the previously known oldest critters trapped in fossilized tree resin, or amber.

Harvard scientists have created a type of “cyborg” tissue for the first time by embedding a three-dimensional network of functional, biocompatible, nanoscale wires into engineered human tissues.

NASA's Curiosity rover on Wednesday left its first tracks on Mars, successfully completing a short test drive that showed it was ready to roll on longer treks for science investigations over the next two years.

Average scores on the ACT exam held steady for the high school class of 2012 but the results show modest progress in the number of students who appear ready for college-level work in math and science.

NASA's Curiosity rover has zapped its first Martian rock, aiming its laser for the sake of science. During the target practice on Sunday, Curiosity fired 30 pulses at a nearby rock over a 10-second window, burning a small hole.