Ephemeral knowledge...

...What our textbooks didn’t say

The typical human temperature is not 98.6 degrees. Continental drift is not hogwash although the theory has been refined as plate tectonics. Almost everything Freud said is hooey, and until 30 years ago, no one knew that a large rock from outer space took out the dinosaurs (some people still debate it). “There’s so much knowledge, and it’s growing all the time,” says Joy Hakim, whose science and history books have won educational awards. “We’re in the information age, and you can’t keep up with all of it.”