Did you know?
30 August 2026
- 01
Adults have 206 bones, but babies are born with about 300 — many fuse together as they grow.
- 02
Light travels fast enough to circle the Earth about 7.5 times in a single second.
- 03
Contrary to popular belief, the Great Wall of China cannot be seen from space with the naked eye.
- 04
Octopus blood is blue because it uses a copper-based molecule called hemocyanin instead of iron-based hemoglobin.
- 05
A single day on Mercury lasts 176 Earth days, longer than its year of just 88 Earth days.
- 06
Saturn's rings are made almost entirely of ice, with only a small amount of rocky material mixed in.
- 07
Jellyfish have existed for at least 500 million years, making them older than dinosaurs.
- 08
Water is unusual in that it expands by about 9% when it freezes into ice.
- 09
Antarctica is technically the largest desert on Earth because it receives so little precipitation.
- 10
The human heart pumps roughly 7,500 liters of blood through the body every day.
- 11
Uranus rotates almost on its side, tilted about 98 degrees compared to other planets.
- 12
The Pacific Ocean shrinks by a few centimeters every year as tectonic plates slowly push together.
- 13
The human skeleton completely replaces itself roughly every 10 years through constant bone remodeling.
- 14
Pound for pound, spider silk is stronger than steel.
- 15
The Moon experiences its own quakes, some of which have lasted more than 10 minutes.
- 16
Cows form close friendships with other cows and show signs of stress when separated from them.
- 17
Diamond and the graphite in pencils are both pure carbon, just arranged in different structures.
- 18
There are more possible unique chess games than there are atoms in the observable universe.
- 19
Earth's inner core is about as hot as the surface of the Sun, roughly 5,200 degrees Celsius.
- 20
An elephant's trunk contains about 40,000 muscles, far more than are in an entire human body.
- 21
Antarctica's ice sheets hold about 70% of all the fresh water on Earth.
- 22
Most distant galaxies are moving away from Earth, showing that the universe is continuously expanding.
- 23
A group of flamingos is called a 'flamboyance.'
- 24
The human brain uses about 20% of the body's energy despite making up only about 2% of its weight.
- 25
Naked mole rats are nearly immune to cancer and can live more than 30 years, unusually long for a rodent their size.
- 26
The platypus is one of only a few mammals that lays eggs instead of giving birth to live young.
- 27
Some wood frogs can survive being partly frozen solid through winter and thaw out alive in spring.
- 28
A Venus flytrap only snaps shut after its trigger hairs are touched twice within about 20 seconds, to avoid wasting energy on false alarms.
- 29
Some bamboo species can grow more than 90 centimeters in a single day, among the fastest growth rates of any plant.