About 66 million years ago, some 80% of ALL SPECIES ON EARTH became extinct -- at the boundary between the Mesozoic and modern eras. In every occurrence of the boundary, all over the world, there was always an odd layer of clay. When the thin clay layer was found to have high levels of iridium -- an element rare on Earth's surface -- things got interesting.
28 September 2019
IT'S LIVE!!!
Here we go again! This is becoming a tradition. I present a science talk at LibertyCon, get standing-room-only attendance, and end up turning it into an ebook! This time, it was the asteroid impact that is believed to have caused the dinosaur extinction.
And so here it is. I hope you enjoy it. 18 October 2019
INCOMING! The Chixulub Asteroid Impactor is the NUMBER ONE NEW RELEASE IN GEOLOGY and TWO-HOUR SCIENCE & MATH SHORT READS! (I think it's a bit longer read than THAT, though!)
More to come...
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