2. Alfred Hitchcock didn't have a belly button.
Sort of true, he was born with with one like all mammals but his was sewn up after surgery.
5. Only 7% of the population are lefties.
Depends on which study you ask. This one
6. People do not get sick from cold weather, it is from being indoors a lot more.
Way to vague to be any sort of wierd trivia.
7. Forty people are sent to the hospital every minute from a dog bite.
That would be a very different estimate than what this site
claims. 1,000 per day vs 57,600 per day...
8. Babies are born without knee-caps, they don't appear until ages 2-6 yrs.
9. The average person over 50 has spent 5 years waiting in line.
Brief debunking of this is here
10. The toothbrush was invented in 1498.
Err, no. Link
14. The average computer user blinks 7 times per minute.
Depends on who you ask. This
claims it to be 5 blinks a minute.
16. Most of us have eaten a spider in our sleep.
17. The REAL reason ostriches stick their head in the sand is to search for water.
Ostriches do not stick their head in the sand.
26. If coloring weren't added to Coca-Cola, it would be green.
If no coloring were added to Coke it would would be clear because it would be water. Snopes