Did you know?

1.The Milky Way is a vast spiral containing over 100 billion stars.
2.A light-year is the distance light travels in a year~~~almost 6 trillion miles [10 trillion km],and the Milky Way is 100,000 light-years across.
3.After the first millisecond of the Big Bang,the expanding universe was 50 million times denser than lead,and 30 million times hotter than the Sun.
4.The brightest star that can be seen on Earth,the "Dog Star" Sirius,gives off 30 times more light than the Sun.
5.When a comet struck Siberia in 1908,a 37-mile [60 km] area of forest was flattened and the shockwaves were felt in London,England.
6.If the ice at the polar caps melted,the oceans would rise by nearly 330 feet [100 m].
7.The seas on Earth contain 60,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 water molecules!
8.The most powerful earthquake ever recorded measured 9.5 on the Richter Scale,and it struck Chile on May 22,1960.
9.A type of sandstone called itacolumite can be bent by hand.
10.The densest planet in the Solar System is the Earth,because of the dense rocks found on the planet.
11.The lightest planet in the Solar System is Saturn.If it was the same size as a tennis ball,it would float on the surface of water.
12.If an atom was the size of a strawberry and you put it down on the ground,it would dig a hole right into the middle of the Earth.
13.If a nucleus was the same size as a coin,the whole atom would be an olympic stadium.
14.A cheetah has an acceleration of 0 to 50 mph [0 to 80 kph] in 2 seconds.
15.An elephant pregnancy lasts for 22 months.
16.Remains of prehistoric dragonflies were shown to have a wingspan of 32 inches [60 cm].
17.The largest dinosaur known is Seismosaurus.It reached a height of 118 feet [36 m] and a weight of 80 tons.
18.The smallest dinosaur known is Microraptor,not Compsognathus.The Microraptor reached a full length of 60 cm,while a Compsognathus was 90 cm.
19.The teeth of a Tyrannosarus had a length of 6 inches [15 cm]~~~almost the size of a banana.
20.The largest creature ever to have existed,the Blue Whale,weighed more than 20 elephants,and its heart is the same size as a small car,and it beats only 8 times per minute.
21.The smallest bird,the bee hummingbird,is smaller than a regular dragonfly and weighs less than an ounce.
22.An albatross has a wingspan as wide as an elephant is tall.
23.A group of hawks is called a cast,a group of starlings is called a murmuration,and a group of nightingales is called a watch.
24.When the Peregrine falcon dives,it reaches incredible speeds over 186 mph [300 kph].
25.A butterfly's wings are covered with tiny scales.
26.Monarch butterflies migrate over 1,864 miles [3,000 km] from Canada to Mexico.
27.A snake charmer's music cannot be heard by the snake!
28.Snakes have an average of 400 vertebrae in its body.
29.Bats are the only mammals that can truly fly.
30.The liver of a polar bear is poisonous.
31.44 of the 70 animal found below the Antarctic circle are insects.
32.One thread of spider silk is twice as strong as steel,but 250 times finer than human hair.
33.An ant can carry 50 times its own weight.
34.If a human had the jumping powers of a grasshopper,he can leap one-third the length of a soccer pitch.If he had the jumping powers of a flea,he can jump over the St. Paul Cathedral.
35.An average swarm of locusts can be so huge it can block out the Sun!
36.When a rabbit becomes pregnant,so do the fleas on its skin.
37.If a species of beetle called tiger beetle were the size of a horse,it would run at a speed of 250 mph [400 kph].
38.An earthworm is hermaphrodite~~~which means it's both male and female.
39.There are over 100 billion cells in the human body.
40.One drop of blood contains 5 million red blood cells,but only 15,000 white blood cells.
41.The blood vessels in one human body would encircle the world by the equator twice if laid end to end.
42.One-fifth of the world's population lives in China.
43.A black hole has gravity strong enough to suck in anything,even light.
44.The largest star known today is the VY Canis Majoris.Its diameter is 3,000 times that of the Sun.
45.Lightning is sometimes hotter than the Sun.
46.You cannot hum  if you plug your nose with your thumbs.
47.To measure the distance of a storm from you,start counting after you see lightning,then stop after you hear thunder.For every 3 seconds you counted,the storm is 1 mile away.
48.An owl can rotate its head up to 180 degrees~~~which means it can see what is behind it without moving its whole body!
49.A Blue Whale's cry is measured 180 decibels loud.A human ear is harmed when it hears a sound of 140 decibels.
50.A coin falling from top of a skyscraper can critically injure a person,but it won't be fatal.