Text clue to ancient radiation spikeBreaking News
An eerie "red crucifix" seen in Britain's evening sky in ad 774 may be a previously unrecognized supernova explosion — and could explain a mysterious spike in carbon-14 levels in that year's growth rings in Japanese cedar trees. The link is suggested today in a Nature Correspondence by a US undergraduate student with a broad interdisciplinary background and a curious mind1.
A few weeks ago, Jonathon Allen, a biochemistry major at the University of California, Santa Cruz, was listening to the Nature podcast when he heard about a team of researchers in Japan who had found an odd spike in carbon-14 levels in tree rings. The spike probably came from a burst of high-energy radiation striking the upper atmosphere, increasing the rate at which carbon-14 is formed (see 'Mysterious radiation burst recorded in tree rings').
But there was a problem: the only known causes of such radiation are supernova explosions or gigantic solar flares, and the researchers knew of no such events in ad 774 or 775, the dates indicated by the tree rings....
comments powered by Disqus
- Did Salmonella Kill Off the Aztecs?
- Jewish history is under siege in the middle east and these volunteers are risking their lives to protect it
- 'Amazon should stop selling Holocaust denial books'
- National Museum of African American History and Culture Reaches Milestone of 1 Million Visitors
- What Makes a President Great? Clipping? Sipping? Slashing?
- McMaster knows how national security policy can go wrong. Will that help him?
- Historian and Antiwar Activist Marilyn Young Dies at 79
- Trump Chooses Historian H.R. McMaster as National Security Adviser
- Holocaust Historian Deborah Lipstadt Explains Why People Believe Trump's Lies
- Princeton’s Harold James warns World War Three is now a "serious threat”