Lea Hájková
More ideas from Lea
If you convince yourself that you slept well last night, even if you didn’t, your brain will be tricked into thinking you aren’t tired. It’s called ‘placebo sleep.’

did-you-kno: If you convince yourself that you slept well last night, even if you didn’t, your brain will be tricked into thinking you aren’t tired. It’s called ‘placebo sleep.

Einstein's Riddle. Get paper and pen before attempting this.

Einstein's Riddle--The Zebra Puzzle; there's no evidence to support Einstein's authorship of this puzzle, nor the claim, but it's still a fun riddle

Interesting... One of my History teachers in High School gave us this and we went over it

Funny coincidence history about John Kennedy and Abraham Lincoln. But Lyndon B. Johnson was president upon Kennedy's assassination, not Andrew Johnson.history repeats itself in a weird way.