1] Like fingerprints, every one’s tongue print is different.
The tongue is a unique organ in that it can be stuck out of mouth for inspection, and yet it is well protected in the mouth and very difficult to forge. The tongue also presents both geometric shape: information and physiological texture information which are potentially useful in identity verification applications.
2]Neither fish nor sharks blink.
Neither fish nor sharks blink, although sharks do have eyelids. There is no need to blink because the water cleans their eyes and obviously keeps them moist. Most sharks do have what are called nictitating membranes that they use to cover and protect their eyes when they strike their prey.
3]”Dreamt” is the only English word that ends in the letters “mt”.
According to Oxford Dictionaries, ‘dreamt’ is the only English word that ends with ‘mt‘. The word’s derivatives including undreamt, daydreamt, and redreamt are the only other words that end with the same letters.
4] An ostrich’s eye is bigger than its brain.
Ostrich is the largest bird in the world having the largest eyes in the whole animal kingdom that are even bigger than its brain. An ostrich’s eyes are about 2 inches (5 centimetres) in diameter.
5] A cat has 32 muscles in each ear.
Thirty-two individual muscles in each ear allow for a kind of directional hearing; a cat can move each ear independently of the other. Because of this mobility, a cat can move its body in one direction and point its ears in another direction. Most cats have straight ears pointing upward.
6] An astronaut’s footprint can last a million years on the surface of the moon.
An astronaut’s footprint can last a million years on the surface of the moon. It have been decades since we last set foot on the moon, but its surface is still marked with the historic footprints of the 12 astronauts who stomped across it. That’s because the moon has no atmosphere.
7] A neutron star can spin 600 times in one second.
The newly-discovered star rotates 716 times per second – faster than some theories predict is possible – and therefore may force researchers to revise their models. Neutron stars form when a massive star explodes at the end of its life and leaves behind a super-dense, spinning ball of neutrons.
8] The Earth’s core is as hot as the surface of the sun.
New measurements suggest the Earth’s inner core is far hotter than prior experiments suggested, putting it at 6,000C – as hot as the Sun’s surface. The solid iron core is actually crystalline, surrounded by liquid
9] One teaspoon of a neutron star would weigh six-billion tons.
The pressure in the star’s core is so high that most of the charged particles, electrons and protons, merge resulting in a star composed mostly of uncharged particles called neutrons.
10] It takes eight minutes and 19 seconds for light to travel from the sun to Earth.
Sunlight travels at the speed of light. Photons emitted from the surface of the Sun need to travel across the vacuum of space to reach our eyes. The short answer is that it takes sunlight an average of 8 minutes and 20 seconds to travel from the Sun to the Earth
11] Almonds are a member of the peach family.
12] A crocodile cannot stick its tongue out.
13] A shrimp’s heart is in its head.
it’s true that shrimp’s heart is located on its head. Actually the heart of shrimp is located on its thorax reason just after the head but it seems as situated in its head because the head & thorax is totally covered with a single exoskeleton only.
14] It is physically impossible for pigs to look up into the sky.
It is physically impossible for pigs to look up straight to the sky. It’s the anatomy of their neck muscles and the spine that limits the movement of their head and restricts them to look totally upwards.
15] If you sneeze too hard, you could fracture a rib.
Too much coughing or sneezing can also strain your rib muscles. It can begin slowly over time or happen suddenly. A muscle strain can cause chest pain. Your ribs may feel bruised or tender.
16] Cat urine glows under a black-light.
Cat urine, in particular, glows very brightly under ultraviolet light. Urine glows under a black light primarily because it contains the element phosphorus
17] A bolt of lightning is five times hotter than the sun.
Air is a very poor conductor of electricity and gets extremely hot when lightning passes through it. In fact, lightning can heat the air it passes through to 50,000 degrees Fahrenheit (5 times hotter than the surface of the sun).
18] The nose can detect a trillion smells!
Humans can distinguish more than 1 trillion scents, according to new research. The findings show that our sense of smell is far more discriminating than previously thought.
19] Your blood is as salty as the ocean.
Our flowing blood is salty, too. In fact, about 55 percent of the salt in the body is dissolved in fluids outside our cells, like blood plasma. Another 40 percent of the body’s salt is inside our bones.
20] The wind is silent until it blows against something.
The wind is silent until it blows against something. This gets into some pretty complex areas of the physiology and physics of sound as well as fluid flow, but the main fact (generalization) to realize is that fluid that is moving in straight lines doesn’t make any noise.