Behind the Sun, the comet appears to show signs of acceleration beyond what is expected by gravity. And for reasons not yet clear, it appears to have changed color.
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By SDTodayBehind the Sun, the comet appears to show signs of acceleration beyond what is expected by gravity. And for reasons not yet clear, it appears to have changed color.
Expedition member Chris Blakeley in the entrance to the world’s northernmost known cave, found on the Wulff Land…
BySDTodayThe Chicxulub asteroid brought the age of the dinosaurs to an end ROGER HARRIS/SCIENCE PHOTO LIBRARY The asteroid…
BySDTodayThe ice floe cracks up around the Endurance Royal Geographical Society After the British ship Endurance (pictured above)…
BySDTodayEarth was once covered by a global magma ocean, which later cooled and crystallised – now traces of…
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