In 2007, Berkeley researchers laid a 10-meter trail of chocolate oil across a field. Blindfolded and wearing earplugs, volunteers followed it on all fours, noses to the ground. About two-thirds succeeded, zigzagging just like dogs, and they got much better with practice. Our sense of smell is far better than its reputation.
Remembering is not replaying a recording — it is rebuilding. Each time you recall a memory, it becomes temporarily malleable and can be altered before being stored again. That is why two people can sincerely remember the same event… differently.
In 2003, Johnson and Goldstein compared European countries. Where you must tick a box to become a donor, consent rates ranged from 4% to 28%. Where you're a donor by default unless you opt out, they topped 85%. People aren't more generous on one side; most simply stick with whatever option was chosen for them.