greatergood.berkeley.edu

X0jBQ TIL: When someone important to you abruptly leaves you, your brain has a similar response to physical pain
VB5aQ TIL an analysis found it took students 43 hours & adults 94 hours (on avg) for two acquaintances to turn into casual friends. Students needed 57 hours to transition from casual friends to friends; adults 164 hours. For students, friends became good/best friends after 119 hours; adults about 219 hrs.
78MZL TIL that only 15-20% soldiers fired their weapons during WWII. Those who would not fire did not run or hide—in many cases they were willing to risk greater danger to rescue comrades, get ammunition, or run messages.