Carl Sagan explains how the ancient Greeks knew the Earth was round and calculated its circumference over 2,000 years ago. pic.twitter.com/xgJsj6yM79— Vala Afshar (@ValaAfshar) June 24, 2020
from Twitter https://twitter.com/ValaAfshar
June 24, 2020 at 09:03AM
No comments:
Post a Comment