Supernovae and Extinction Events
Recent research suggests there may be a link between a supernova about 2.6 million years ago and the extinction of a large number of marine megafauna on the Earth at the time.
Recent research suggests there may be a link between a supernova about 2.6 million years ago and the extinction of a large number of marine megafauna on the Earth at the time.
The Chandra X-Ray Observatory has developed a glitch and gone into safe mode. The 19 year old spacecraft is well past it’s design life but continues to produce incredible science so hopefully it’ll be back to full serviceability very soon.
(And we can do something about it.)
Life needs CHNOPS, the six essential elements Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, and Sulphur. Curiosity found them on ancient Mars, but a new study shows Earth was born without them. Only a lucky impact with Theia made our world habitable. In contrast, Venus never stood a chance. Meet the three planetary siblings and discover why only Earth became a cradle for life.
Mars’s mantle contains ancient fragments up to 4km wide from its formation—preserved like geological fossils from the planet’s violent early history.
Cosmic rays are hitting the atmosphere constantly. One of the products of the collisions is muons, and we can detect muons on the surface of the Earth to learn about the cosmic rays.
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