Friday links

Tomorrow is the 2,494th anniversary of the battle of Thermopylae.

How to Tell Whether You've Got Angst, Ennui, or Weltschmerz.

An interesting look at taxes and loopholes: How The Burrito Became A Sandwich.

Interesting vintage video describing how simple machines become more complex: How manual transmission works.

Some science for Guardian of the Galaxy fans: What Real-Life Plants Could Groot Have Evolved From?

The Strange Real-Life Origins of the Fiendish Werewolf.

ICYMI, Thursday's links are here, and include the Science of Star Wars, an (ok for work) instructional video from 1997 on How to Have Cybersex on the Internet, land ownership - How Far Above and Below Do You Own, and 33 Onion Stories That People Fell For.