Science is full of surprises, with discoveries that challenge what we think we know. Here are 20 mind-blowing science educational facts that seem unreal but are 100% true.

Water can exist in two phases at once.
In a vacuum, water can reach a state called the triple point, where it simultaneously boils and freezes.

Bananas are radioactive.
Bananas contain a small amount of radioactive potassium, making them slightly radioactive. However, it's harmless in small quantities.

There are more stars in the universe than grains of sand on Earth.
Scientists believe there are more stars in the universe than grains of sand on all the beaches on Earth—mind-boggling but true.

Neutron stars are insanely dense.
These celestial objects are so dense that just a teaspoon of one would weigh about 6 billion tons on Earth.

Humans share 60% of their DNA with bananas.
As strange as it sounds, humans and bananas have a surprising amount of DNA in common.

Sharks have been around longer than trees.
Sharks have been on Earth for around 400 million years, while trees only appeared around 350 million years ago—making sharks older than trees.

A day on Venus is longer than a year on Venus.
Venus has such a slow rotation that a single day on Venus is longer than its year. It takes 243 Earth days to complete one day!

The octopus has a triple-hearted circulatory system.
Octopuses have three hearts—two pump blood to the gills, while one pumps it to the rest of the body.

Metal expands with heat, affecting even famous structures.
The Eiffel Tower can grow up to 6 inches taller in summer due to the expansion of metal when it’s heated.

It rains diamonds on Jupiter and Saturn.
On the gas giants of Jupiter and Saturn, extreme pressure can turn methane into diamonds, resulting in literal diamond rain.

The Mpemba effect makes hot water freeze quicker.
It defies logic, hot water can freeze faster than cold water under certain conditions—this phenomenon is known as the Mpemba effect.

Earth’s trees outnumber the stars in our galaxy.
There are over 3 trillion trees on Earth, which is more than the 100–400 billion stars in the Milky Way galaxy.

Honey never spoils.
Archaeologists have found honey in ancient tombs that is still good to eat, proving that it can last thousands of years without spoiling.

Lightning packs a punch with energy.
One lightning strike contains enough energy to toast an incredible number of bread slices.

The oceans hold nearly 20 million tons of gold.
Scientists believe the oceans contain up to 20 million tons of gold dissolved in seawater, though it's too dilute to be economically viable.

Space itself can move faster than light.
While nothing within space can travel faster than the speed of light, the fabric of space itself is expanding so rapidly that parts of the universe are moving away from us faster than light.

Cockroaches are incredibly resilient.
Because of how they’re built, cockroaches can survive for weeks after being decapitated—until they die of starvation.

Ants can carry 50 times their body weight.
Even though they’re tiny, ants can lift objects up to 50 times their body weight, making them one of the strongest creatures relative to size.

Humans shed about 40 pounds of skin by age 70.
By the time you’re 70, you will have shed around 40 pounds of dead skin cells—meaning your skin is always renewing itself.

The sun makes up 99.86% of the solar system's mass.
The sun is so gigantic that it contains 99.86% of all the mass in the solar system—meaning all the planets and other objects are just a tiny part of the system.