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nova

WHAT IF: The Sun Exploded… Soon?

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Supernova - Deposit Photos

Every Wednesday, we’re asking a what-if question – how would our world be different if something were changed? Today’s question is from QSFer Scott: Scientists say we have about five billion years before the sun is likely to explode. But what if we found out it was happening in the next 12-24 months? Share your serious scientific analyses, your off-color jokes, and random thoughts on the topic on our FB and MeWe Groups: FB: http://bit.ly/1MvPABV MeWe: http://bit.ly/2mjg8lf

Did Exploding Stars Bring Us to Our Feet? – Live Science

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nova - NASA

As human ancestors went from swinging through trees to walking on two legs, they may have received a boost from an unlikely source: ancient supernovas. These powerful stellar explosions may have showered Earth with enough energy to shift the planet’s climate, bathing Earth in electrons and sparking powerful, lightning-filled storms, according to a new hypothesis. Lightning then could have kindled raging wildfires that scorched African landscapes. As savanna replaced the forest habitat, early humans that lived there may have been pushed to walk on two legs, the new study suggests. However, don’t go jumping to conclusions just yet. Many factors … Read more