Top science stories of 2013: Mars, a new mammal, a meteor
WASHINGTON -- It has been a thrilling year of discovery in many areas of science, but also a sobering time -- federal funding cuts threaten the future of innovation, and rising carbon dioxide levels foreshadow environmental and health challenges linked to climate change. This was the year we learned that Mars was habitable billions of years ago, and also that Lady Gaga reportedly intends to be the first artist to sing in outer space in 2015 (will the papa-paparazzi follow?).
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