The Thread of Knowledge

 I got this idea from another forum I post to.  Post a fact of some kind.  Make sure it's something factual.  It can historical or just funny.  One fact per post, but you can post as many facts as you can.  Have fun.

My first factoid:

Cheetah's chirp to summon their young.

...okay, I'm bored so here we go!

We all know that cats purr when they feel affectionate towards someone or something. But cats can also purr if they're in great pain or if they are sick.

...yeah! XD

Llamas will make an alert call similar to a horse whinney when they see something out of the ordinary. 

Antacid medicines like prevacid can actually absorb your other medications if taken within the same hour.

...

Bats are the only mammals that can fly

The collective term for cats is clowder.

In Tennessee duelists and atheists are not allowed to be elected to public office. 

The longest word in the English language typed using only the top row of a keyboard is "typewriter".

John Adams and Thomas Jefferson (long time rivals) died on exactly the same day July 4 50 years to the day that the Declaration of Independance was written (within an hour of each other too)

A sneeze leaves your mouth at 600 miles per hour!

Cool, so I DO have super powers! I knew it!

America is named after Amerigo Vespucci, which is a mistake. Back at the time, he was the first to mention in his diaries setting foot on a new land. The man who made the maps of the «New land» named it after Amerigo for they all thought he was the discoverer. Christopher Columbus died without never knowing he was the one to «discover» the Americas, when he stepped on the continent he thought it was another island...

The cotton gin was supposedly invented by Eli Whitney, but he actually copied the idea from a plantation slave. The slave had made the instrument to make his job easier. Eli took the idea, added tweaks and patented it.

Also, we all know the Native Americans got stiffed when selling their land. Well, recently they found out that if they were to sue the United States for all of that (not the abuse or suffering or other injustices) the cost would be more than America has ever even owned as a nation.

Yankee Doodle Dandy was actually meant to insinuate that the American soldiers were gay. The Yankee Doodle was a men's club in Britain where men discussed clothing and tea.

On February 20, 1943 in a cornfield near the village of Paricutin, Mexico, the ground cracked open and began to spew red-hot rocks. A volcano was born. It grew to 35 feet the first day. By 1952, it had soared to 1,352 feet and had buried two towns.

The combination "ough" can be pronounced in nine different ways. The following sentence contains them all: "A rough-coated, dough-faced, thoughtful ploughman strode through the streets of Scarborough; after falling into a slough, he coughed and hiccoughed."

In the 1940s, the FCC assigned television's Channel 1 to mobile services (two-way radios in taxicabs, for instance) but did not re-number the other channel assignments. That is why your TV set has channels 2 and up, but no channel 1.

...always noticed channel one's non-existence, but never thought about why.

Polar bears have been documented playng with sled dogs.

Did you know that liquid water does not currently occur on Mars because of the cold temperatures and low atmospheric pressures. Only water ice and water gas (vapor) are stable. However, large channels on Mars appear to have been cut by outflows of liquid water during Mars' distant past which may have had warmer temperatures and a much thicker atmosphere.