Bone fragments from seven horses and a camel suggest that the First Americans hunted and butchered these animals in North America at least 13,300 years ago after migrating from northeast Asia, hundreds of years earlier than previously thought.
By Laura Santhanam
Neil Roach explains why humans throw with such high velocities.
Climate Change Skeptic No Longer Doubts Human Role in Global Warming…
With the space shuttle era now over and U.S. space flight on the verge of going private for the near future, the company behind the so-called SpaceX project has ambitious plans to make space flight cheaper for cargo and for…
How close are we to being replaced by robots? NewsHour Science Correspondent Miles O'Brien reports on efforts to engineer robots that are eerily similar to humans and animals.
The U.S. Food and Drug Administration is in the process of deciding whether to allow genetically modified salmon to be sold to American consumers and how to label them if they are sold. Margaret Warner gets two perspectives.
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