Scientists in Japan use ancient trees to look back on the history of our local cosmos, and discover a mystery.
Since the invention of the telescope in the year 1608, mankind has collected information about our local cosmos. As it turns out, we’re not the only ones. Trees have been doing the same for millennia.
A group of physicists led by Nagoya University graduate student Fusa Miyake has begun using information stored in ancient Japanese cedars to gain the oldest firsthand accounts of the local universe. They have discovered, hidden within tree rings, clear evidence of some surprisingly high-energy events—possibly supernovae or solar flares—that occurred more than 1200 years ago.
In this gut-wrenching talk, Sergeant Andrew Chambers shares the haunting story of his time in Iraq and the tough transition home that landed him in jail. It’s a powerful testimony to the struggle our soldiers face when they come home, and the tragic ways that they can be denied the help they need.