It takes about 20 seconds for a red blood cell to circle the whole body.
102
Babies crawl an average of 200m a day.
212
The human eye blinks an average of 4,200,000 times a year.
233
Enamel is hardest substance in the human body.
61
In one day, adult lungs move about 10,000 litres of air.
11
Pain occurs when sounds are above 130 db.
124
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
