72: New clues about Earth’s greatest mass extinction event - SpaceTime with Stuart Gary Series 21 Episode 72

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*New clues about Earth’s greatest mass extinction event

Halogens released during the Siberian Traps eruption may have been one of the driving forces behind the world’s greatest mass extinction event.

*The most detailed map yet of nearby galactic cosmic ray sources

Astronomers have developed the most detailed map ever of cosmic ray sources in two of the Milky Way galaxies nearest neighbours.

*New clues about supernovae

Astronomers have discovered a previously undetected flash just before the death of a star in a core collapse supernova explosion.

*Saturn’s famous hexagon may tower above the clouds

The long-lived Cassini mission revealed a surprising feature emerging at Saturn's northern pole as the ringed world was nearing its northern summertime -- a warming, high-altitude vortex with a hexagonal shape, akin to the famous hexagon seen deeper down in Saturn's clouds.

*The Science Report

A new study claims being optimistic about stuff is actually good for your heart.

Warnings the endangered Australian fur seal population is shrinking.

E-commerce stores worldwide infected with new payment skimming malicious software.

Scientists find evidence of cheese-making in Eastern Europe 7200 years ago.

Alex on Tech – Apple say they’re not listening in.

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