Links for 2021-01-26

  1. Just how dark were the Dark Ages? [Joshua Learn / Discover Magazine]
  2. Is Einstein’s cosmological constant the same as dark energy? [Ethan Siegel / Forbes]
  3. Best illusions of 2020 [Best Illusion of the Year Contest]
  4. What was electricity up to before we discovered it? [Alexandru Micu / ZME Science]
  5. We need better face masks—and origami might help [Maya Wei-Haas / National Geographic]