Cygnus X-1 remains one of the best-studied black holes. Our knowledge of it just got even better.
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By SDTodayCygnus X-1 remains one of the best-studied black holes. Our knowledge of it just got even better.
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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