The star Sirius B is so dense that a piece of it the size of a sugar cube would weigh several hundred tons.
The speed of light, at 670 million mph, sounds very fast. But a light ray, at this speed, would take about 26 billion years to cross the visible universe.
The universe is apparently infinite in extent. If you could travel a distance in light-years of one thousand trillion digits, you might find another planet identical to Earth with identical people.
There are 62,000 miles of blood vessels in the human body – laid end to end they would circle the earth 2.5 times.
At over 2000 kilometers long, The Great Barrier Reef is the largest living structure on Earth.
The risk of being struck by a falling meteorite for a human is one occurrence every 9,300 years.
A thimbleful of a neutron star would weigh over 100 million tons.
A typical hurricane produces the energy equivalent of 8,000 one megaton bombs.
The safety match was invented by Gustaf Erik Pasch (in the year 1844). It was later improved by Johan Edvard Lundstrom.
Cartography is the science of making maps.
Cobalt-60 is an artificial radioactive isotope of cobalt used for sterilizing surgical instruments.
Photoelectric effect was discovered by Heinrich Hertz and Wilhelm Hallwachs in the year 1887.
Sheep can recognize individual human and sheep faces, and remember them for years.
There are more atoms in a bucketful of water than there are bucketfuls of water in the Atlantic Ocean.
Every day nearly 3,000 earthquakes shake our planet.
Carbon monoxide, notorious as a poison, is invaluable in the chemical industry for purifying metals.
If Everest, our highest mountain, were placed at the bottom of the deepest part of the ocean, its peak would be more than a mile beneath the surface.
About 70 per cent of the Earth's surface is water. By coincidence, 70 per cent of the human body is also water.
The world's fastest supercomputer could take about 7,000 trillion years to find the two prime numbers that make up a 300-digit prime product. But a quantum computer could do the same sum in a few days.
The oceans contain enough salt to cover all the continents to a depth of nearly 500 feet.
The interstellar gas cloud Sagittarius B contains a billion, billion, billion liters of alcohol.
Polar Bears can run at 25 miles an hour and jump over 6 feet in the air.
60-65 million years ago dolphins and humans shared a common ancestor.
Polar Bears are nearly undetectable by infrared cameras, due to their transparent fur.
Silumin is an alloy of aluminium and silicon used for casting purposes.
Molten lava is up to 100,000 times as viscous as water.
An acre of rich fertile farmland may contain up to 1,750,000 earthworms.
The first colour photograph was created by the Scottish physicist James Clerk Maxwell, with the help of the English photographer Thomas Sutton, in the year 1861.
Capybara is the largest living rodent in the world.
The average person accidentally eats 430 bugs each year of their life.
The temperature on the surface of Mercury exceeds 430 degrees C during the day, and, at night, plummets to minus 180 degrees centigrade.
The evaporation from a large oak or beech tree is from ten to twenty-five gallons in twenty-four hours
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