来自MSN1 小时
45 Things Reviewers Said Were The Best Thing They Bought All Year
And some reviewers even call them the best purchases of the decade...or the best thing they've *ever* bought...now those are ...
Weather Underground23 小时
Whirls, Curls, and Little Swirls: The Science Behind Von Karman Vortices
Above: A Von Karman vortex street downwind of the Canary Island chain in the eastern Atlantic Ocean off the coast of Africa on Feb. 27, 2015. Image credit: NASA Worldview. Editor's note ...