The Shark Conservation Act - passed by U.S. lawmakers this week and now headed for President Obama's desk - would tighten the ban on capturing sharks for their fins.
Measuring soot when actually on the road has been a major challenge,, but scientists can now measure the soot content of a car's exhaust while it's on the road.
Scientists used forensic tests to identify the mummified head as belonging to Henri IV, one of France's most beloved monarchs, who was assassinated in 1610.
Justin Gallivan introduces new DNA into bacteria. His technique, similar to cutting and pasting on a computer, lets him pick tasks for the bacteria to perform.