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A recent encounter between a human diver and a humpback whale has illustrated how concern for the safety of others can reach across species. Marine biologist Nan Hauser was on an expedition to the South Pacific’s Cook Islands to study whales for a film that she is making. But while diving with a humpback whale, her 25-tonne subject appeared to be attacking her, at least at first. But what she learned after extricating herself from the leviathan’s advances made her see the whole situation in a completely different light.
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As Earth’s climate continues to warm, some scientists are looking at doing more than simply reducing humanity’s outpouring of greenhouse gases into the atmosphere by devising ways to actively cool the planet back to temperatures that our civilization is comfortable with. One of the proposed techniques would be to spray massive amounts of sulphur dioxide into the atmosphere to create a cloud layer that would reflect a portion of the Sun’s rays back into space, emulating the cooling effect that the gases from a large volcanic eruption would have.read more

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On January 28, 1986, the space shuttle Challenger launched with America’s first civilian to be sent into space, Christa McAuliffe. McAuliffe was chosen from a list of over 11,000 applicants for NASA’s Teacher in Space Project, aimed at sending civilian educators into orbit to later relate their experience as astronauts to their terrestrial students. Tragically, Challenger was destroyed 73 seconds into her ascent, killing all seven crewmembers, including McAuliffe.
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A collision that occurred between two neutron stars in a galaxy 138 million light years from Earth was observed in August of 2017, generating both gravitational waves that were detected by the LIGO and Virgo gravity-wave observatories, and a gamma-ray burst that was recorded by the Fermi and INTEGRAL satellites. This is the first time that both gravity and electromagnetic waves have been detected from an astronomical event, as all previous detections of gravity waves have come from collisions between black holes.read more