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‘Halloween comet’ breaks apart after flying close to the sun
NASA says a recently discovered comet has broken apart as it approached the sun. The space agency said Tuesday its sun-observing spacecraft captured the moment when the comet broke into chunks this week. Astronomers have been tracking the…
NASA astronaut is released from the hospital after returning from space
NASA says an astronaut has been released from the hospital after returning from space. The unidentified NASA astronaut was briefly hospitalized for an unspecified medical issue Friday shortly after returning with three others from a nearly…
Scientists show how sperm and egg come together like a key in a lock
Scientists have pinpointed how sperm and egg fuse together across the animal kingdom, from fish to people. New research by scientists in Austria shows that fertilization works like a lock and key. The study was published Thursday in the…