Amazing Facts

>> The sound you hear when you macho people crack their knuckles is actually the sound of nitrogen gas bubbles bursting.

>> The can opener was only invented 50 years after the invention of the can. The first can was made of solid iron, the weighed more than the food. Instructions read: "Cut round the top near the outer edge with a chisel and hammer."

>> Laika the dog, was the first living thing shot into space. Not mentioned was that Laika died within 7 hours of launch. This fact was only revealed almost 50 years later.

>> Because of an egg's structure, you won't be able to break it by squeezing the ends of an egg with your thumb and finger. Thats why people use the design so often for building arches, gutters, drain pipes, and even when God created the skull.

>> When glass breaks, it showers TOWARDS, not away from the force that broke it.
Honey is the only food that will not spoil because it is hydroscopic, and kills bacteria by sucking water out from them.

>> When the temperature drops, the eyesight reaction time of insects (like the dragonfly and some animals like tortoises) decrease and thats why they can be caught early in the morning or at night by predators like birds whose eyesight reaction times are unaffected by temperature.

>> If you spread out the surface area of the lung, it would fit a tennis court

>> You can test for a two way mirror by putting your fingernail on the surface, if there's space between the tip and the image, then its a normal mirror, if not, its two way.

>> Your nostrils take turns inhaling. You breathe through one for about 3-4 hours then switch to the other one.

>> Would you believe that pigs are smarter than dogs? On the human intelligence scale, pigs are third removed from humans, while dogs are 13th removed, and only primates and dolphines are smarter than pigs. They are quick one time learners, and some learn by watching others.

>> Male feral rabbits urinate on the females to state their ownership

>> A sneeze travels out your mouth at over 100 m.p.h. The highest recorded "sneeze speed" is 165 km per hour. You cannot sneeze with your eyes open.

>> Human tonsils can bounce higher than a rubber ball of similar weight and size, but only for the first 30 minutes after they've been removed.

>> The entire worlds output of urine takes about 45 minutes to go over the Niagra falls.

>> Laid end-to-end, the arteries, capillaries and veins would stretch for about 60,000 miles in the average child and would be about 100,000 miles in an adult - enough to wrap around the world nearly four times.

>> Blue and fin whales can create the loudest sound by animals ever recorded; sounds that have more energy than jet plane noise. It has been calculated that a single breath from a mature blue whale can inflate up to 2000 balloons.

>> Röntgen the inventor of the X-ray was color blind and never commented on the colors of the fluorescence he observed.

>> Interestingly, there is a theory that contagious yawning can be used to measure someone's ability to appreciate other people's mental states (empathy). So autistic people do not yawn in response to videos of people yawning.

>> Zebras are not black with white stripes, but are actually white with black stripes, coz if any of you animal lovers happen to stare at it's butt, you'll notice that the black stripes end there.

Source: www.debrain.net