Ancient Greek astronomy

Carl Sagan explains how the ancient Greeks figured out the Earth isn’t flat, over 2,000 years ago

The denial of science has entered the highest levels of government, and no matter what the data says, the U.S. promises to cease all efforts to curtail, or even study, climate change. Astrophysicist Katie Mack calls this retrenchment a form of “data nihilism,” writing in an exasperated tweet, “What is science? How can a thing be known?