Did you know?

3 September 2026

01
Mercury, the smallest planet in our solar system, has no moons at all.
02
Neptune takes about 165 Earth years to complete one orbit around the Sun.
03
The Milky Way galaxy is roughly 100,000 light-years across.
04
Because the Moon has no wind or water, footprints left there could last for millions of years.
05
Mars has two small moons, named Phobos and Deimos.
06
Wood frogs can freeze solid through winter, with their hearts stopping, then thaw and hop away in spring.
07
Diamonds and the graphite in pencils are both made of pure carbon.
08
Only about 3% of Earth's water is fresh water; most of the rest is salty ocean water.
09
A rainbow forms when sunlight bends and reflects inside countless tiny raindrops.
10
A small static electricity spark, like the one from touching a doorknob, can carry thousands of volts.
11
Many starfish can regrow a lost arm, and some can even regrow a whole body from a single arm.
12
A sloth can take up to a month to fully digest a single meal.
13
An elephant's trunk contains about 40,000 muscles and no bones.
14
The bombardier beetle defends itself by spraying a boiling-hot chemical mixture from its abdomen.
15
Flamingos are born grey; their feathers turn pink from pigments in the shrimp and algae they eat.
16
The Amazon River discharges more water into the ocean than the next seven largest rivers combined.
17
Winds carry millions of tons of Saharan dust across the Atlantic Ocean to fertilize the Amazon rainforest every year.
18
The Dead Sea is so salty that people can float on its surface without effort.
19
Antarctica is technically the world's largest desert because it receives so little precipitation.
20
The longest mountain range on Earth is underwater — the mid-ocean ridge stretches for about 65,000 kilometers.
21
Aspirin's active compound was originally derived from willow bark, used as a pain reliever for centuries.
22
The first pedal-powered bicycles appeared in the early 1800s.
23
Velcro was invented after an engineer noticed how burrs stuck to his dog's fur.
24
The compass was invented in ancient China using a magnetic mineral called lodestone.
25
The microwave oven was invented after an engineer noticed a radar machine melted the chocolate bar in his pocket.
26
The human brain is about 73% water.
27
The outer layer of human skin completely replaces itself about once a month.
28
Human scalp hair grows at an average rate of about 1.25 centimeters per month.
29
Each human eyelash lives for about three months before falling out and being replaced.
30
Human fingernails grow at an average rate of about 3 millimeters per month.