Gun Nation 動画 YouTube https://www.youtube.com/watch?v=lUpCqBonOFw 最近購入した武器を比べあうアメリカの主婦たち Gun Nation USA Ten years ago, Zed Nelson completed a three-year investigation into the gun culture of America. The result was …

Did Dark Matter Kill The Dinosaurs? 動画 YouTube https://www.youtube.com/watch?v=qEA78j6ay1M Dark matter’s shadowy effect on Earth Dark matter’s shadowy effect on Earth July 31, 2019 Astronomy.com ●A dark matter connection? Evidence for da…