01
A Day on Venus Is Longer Than Its Year
Venus rotates so slowly that one full rotation takes about 243 Earth days, while it takes about 225 Earth days to orbit the Sun.
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Explore surprising facts about science, nature, space, and the world around us.
02
Lightning Is Extremely Hot
A lightning bolt can heat the air around it to temperatures hotter than the surface of the Sun.
03
Water Can Exist in Three States
Under the right conditions, water can exist as a solid, liquid, and gas at the same time.
04
Sound Cannot Travel Through Space
Sound needs a medium such as air, water, or another material to travel. The near-vacuum of outer space cannot carry ordinary sound waves.
05
Your Bones Are Living Tissue
Bones are living tissue containing blood vessels, nerves, and cells that constantly build and remodel bone.
06
Octopuses Have Three Hearts
An octopus has three hearts. Two pump blood toward the gills, while the third pumps blood to the rest of the body.
07
Plants Can Communicate
Plants can send chemical signals through their tissues and can also interact with neighboring plants through underground fungal networks.
08
The Human Brain Uses a Lot of Energy
Although the brain makes up only a small part of body weight, it uses a significant share of the body's energy at rest.
09
Some Metals Are Liquid at Room Temperature
Mercury is the best-known metal that remains liquid at typical room temperatures.
10
A Shark Is Older Than Trees
Shark-like animals appeared in Earth's oceans hundreds of millions of years ago, before the first trees evolved.
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Are scientific facts ever updated?
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