IFLScience on MSN5 个月
US Produces First Plutonium Pit For Nuclear Weapons Since 1989
F or the first time in 35 years, the US National Nuclear Security Administration (NNSA) has manufactured a plutonium pit for ...
来自MSN11 个月
Pit Vipers Exciters: Thru-Hiker Tested, Hurricane Approved
Cycling, rock climbing, labwork, construction, running, and thru-hiking the Appalachian Trail: My Pit Vipers Exciters have done it all. After ditching everyday glasses for contacts, I discovered ...