When police find DNA at a crime scene, the amount and how it's handled are crucial components in solving a case. Greg Hampikian, Director of the Idaho Innocence Project, discusses the use and misuse of DNA analysis, and why he says all DNA evidence is not created equal.
NASA's newest Mars rover snapped photos of rocky outcroppings that jut out from the alien soil. Scientists say they look like the remnants of an ancient stream bed where water once flowed on the surface of the red planet.
A future in which a discarded cell phone dissolves into a landfill, rather than living on for thousands of years as garbage, may not be that far off. Melissa Block talks with John A. Rogers, a 2009 MacArthur Fellow and professor of engineering at University of Illinois, about his research into "transient electronics."
In many cultures, milk and tea are natural pairs, while in others, not so much. But if you're drinking tea for health, you might want to hold the milk, because there is some evidence it diminishes the benefits.
NASA's Curiosity rover has found definitive proof that water once ran across the surface of Mars, the agency announced today. NASA scientists say that new photos from the rover show rocks that were smoothed and rounded by water. The rocks are in a large canyon and nearby channels that were cut by flowing water, making up an alluvial fan.
The world depends on one chunk of metal for measuring the mass of everything on earth. We check out a copy of that official kilogram in Gaithersburg, and explore why the cylinder's mass is mysteriously changing.
A huge, magnitude-8.7 earthquake in April produced stronger ground shaking than any earthquake ever recorded, and surprised seismologists by triggering more than a dozen moderate earthquakes around the world. One seismologist thinks we're witnessing the gradual evolution of a new boundary between tectonic plates.
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