The air released from an explosive cough moves at speeds up to 60 mph.
The most difficult tongue twister in English language - "sixth sick sheik's sixth sheep's sick".
Varicella is also known as chicken pox. One theory states that it was so called because of the mildness of the disease compared with other poxes. An another hypothesis is that it was so named because the lesions resembled chick-peas.
Fingerprints appear in a fetus by the age of three months.
The average human body contains:
iron to make a 3 inch nail
sulfur to kill all fleas on an average dog
carbon to make 900 pencil
potassium to fire a toy cannon
fat to make 7 bars of soap
phosphorous to make 2,200 match head
and water to fill a ten-gallon tank.
For a fingernail or toenail to grow from base to tip, it takes about 6 months.
Sartorius is the longest muscle in the human body. It helps in sitting cross-legged. Its name is derived from the word "sartorial" - the traditional cross-legged position of tailors (or "sartors") at work.