On the International Space Station's altitude (~400 km), Earth's gravity is still about 90% of surface gravity. Astronauts float because they're in continuous free fall while orbiting the Earth at about 17,000 mph (roughly 27,600 km/h) - not because of zero gravity.

reasoning that tests truth by holding opposing ideas in tension.

seeing meaningful patterns (often faces) in vague or random data.

a dispute about words; a battle of wording rather than substance.

strong contrast between light and dark in art; the use of light and shadow.

oversimplifying something complex.

physical beauty; comeliness.

the spirit of the time; the general trend of thought or culture in a period.

contained in or carried on by letters; relating to letters.

relating to a biological cycle that repeats about every 24 hours.

the investment of emotional significance in an activity, object, or idea.