This week in science: fossilized 'mammoth' bones found to be from a completely different animal; NASA returns Space Station astronauts early after a medical issue; a surprising benefit to having red hair; and much more! 'Mammoth' Bones Kept in a Museum For 70 Years Turn Out to Be An Entirely Different Animal DNA and isotope analyses have revealed that fossils discovered in Alaska in 1951 aren't mammoths, as long assumed: They're whales. "Although the mysterious radiocarbon dates of these two

Tag-uri: DNA