Updated: 8:29 PM UTC, Jul 16, 2017

Lightning Rod and Power Surge Protector Different Functions

Lightning rods and surge protection are different devices with different functions : the lightning rod is used to channel lightning to earth in a direct impact on a structure to protect it from fire for instance, while the SPD is to prevent surges in power lines and telecommunications.

Now I Know
889
I Knew it
372

The Role of Catapults on Aircraft Carriers

Planes aboard aircraft carriers do not take off due solely to their propulsion power, as the length of the deck may be too short. Steam-powered catapults assist planes in reaching the speed necessary to take off.

Now I Know
998
I Knew it
462

The Coriolis Effect

The accepted statement of physics which dictates that water rotates in one direction on one hemisphere and in reverse direction on another hemisphere does not apply to sinks and toilets.

Now I Know
731
I Knew it
472

Einstein’s Theory of Relativity

It has been discovered that time and speed are clearly linked: take two synchronized clocks, place one on the ground, the other in an airplane flying around the world.

Now I Know
709
I Knew it
448

The Importance of Oral Hygiene for Athletes

Poor oral hygiene is a major contributor to cavities. Surprisingly enough it may also have other consequences for athletes, such as tendinitis. In the case of cavities, fragments of germ membrane pass through the blood and irritate the tendons.

Now I Know
872
I Knew it
406

Do You Know the Connection Between Adidas and Puma?

The sports brands Adidas and Pumas were created by two brothers, Adolf and Rudolf Dassler, co-owners of a shoe factory. Following a disagreement in 1948 they founded their respective enterprises: Adolf with Adidas (Adi was his nickname and Das for Dassler) and Puma for Rudolf.

Now I Know
808
I Knew it
443

The Two Color Rule in Table Tennis

The two color rule was initiated in July 1986, stating that one side of the racket rubber must be red and the other side black. This measure was introduced because of the increased use of "combination" rackets, notably during a European championship game when the winner had used a racket whose sides were both red.

Now I Know
778
I Knew it
313

Handball - An Outside Sport

Handball was originally  an open air sport, with 11 players on each team.The correct pronunciation is “hande balle” as the origin of this term is German and not English.

Now I Know
880
I Knew it
466

Why Are Formula One Mercedes Called the Silver Arrows?

The origin of this nickname date back to 1934 when von Brauchitsch prepared for the maiden Mercedes race on the Nürburgring circuit. Discovering that the vehicle surpassed the regulation 1653 pounds, the driver and racing manager decided to strip off the original white paint, exposing the silver aluminum surface.

Now I Know
1027
I Knew it
424

Bill Gates’ Taxes Stumped the IRS

Bill Gates and his vast fortune have caused unexpected problems for the IRS because the computers used to calculate the average taxpayer’s contributions could not manage to calculate his taxes. They needed to store the financial data of Gates (founder of Microsoft) on a special machine in order to calculate his tax bill.

Now I Know
745
I Knew it
515

Humidity Sensors in Mobile Devices

Many mobile devices (phones, mp3 players, etc..) have moisture sensors that allow the manufacturer to determine whether the device received for service had been exposed to a liquid. If this is the case, the warranty will be refused.

Now I Know
828
I Knew it
395

The Prohibition of Nuclear Weapons with iTunes

The license to use iTunes, the digital content management software of Apple specifies that you are limited as to its use. There, you have been warned!

Now I Know
776
I Knew it
474