Flapping frequency of birds, insects, bats and whales predicted by body mass and wing area alone

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The Hubble Space Telescope is facing a setback but should continue to operate for years, NASA says

A problem with one of the Hubble Space Telescope's three remaining gyroscopes, critical for pointing and locking onto targets, has prompted mission managers to switch to a backup control mode…

Continue ReadingThe Hubble Space Telescope is facing a setback but should continue to operate for years, NASA says