R.S.V.P.
R.S.V.P. comes from the French phrase, 'répondez, s'il vous plaît,' which means 'please reply.' According to western etiquette, you should reply promptly if you receive a formal invitation.

999
One thousand contains the letter A, but none of the words from one to nine hundred ninety-nine has an A.

Most destructive disease
The most destructive disease is malaria. More than 1.5 million people die from malaria every year.

Bacteria per square inch
The skin of the armpits can harbor up to 516,000 bacteria per square inch, while drier areas, such as the forearms, have only about 13,000 bacteria per square inch on them.

Highest Flight
Some breeds of vultures can fly at altitudes as high as 36,900 feet.

Mosquitoes do not bite
Mosquitoes do not bite. They stab. A mosquito has no jaws, hence when attacking a victim, it pierces it with its long proboscis and sucks the blood up through it's nasal tube.

Cat's urine
A cat's urine glows under a black light.

Powerful ant
The ant can lift 50 times its own weight, can pull 30 times its own weight and always falls over on its right side when intoxicated.

Alternates hands when typing
Skepticisms is the longest word that alternates hands when typing.

Spiders fear
On average people fear spiders more than they do death.