Can Tree Rings Solve a 7000-Year-Old Mystery?

Science Can Tree Rings Solve a 7000-Year-Old Mystery? Ancient pines may be hiding clues to a solar event that blasted the earth with cosmic radiation 7000 years ago. In fact, trees have a lot to say about our history. You just have to know how to ask. READ NOW Advertisement READ THESE Can Solar Storms Hurt the Planet (or You)? Other Planets Have Their Own 'Northern Lights' Wedge Tornadoes: Nature's Largest Twisters You are receiving this newsletter because you subscribed to the Today I Learned newsletter. If you wish to unsubscribe, please click here An About.com Brand 1500 Broadway, 6th Floor, New York, NY, 10036 © 2017 About.com - All rights reserved. Privacy Policy.