Did you know?

2 September 2026

01
A resting human heart beats about 100,000 times a day, which adds up to roughly 2.5 billion beats over a 70-year life.
02
An adult human skeleton has 206 bones, but a newborn baby has about 300 — many fuse together as the body grows.
03
Oceans cover about 71% of Earth's surface, but they hold about 97% of all the planet's water.
04
The human tongue has about 10,000 taste buds, and each one is replaced roughly every two weeks.
05
Despite its long neck, a giraffe has only 7 neck vertebrae — the exact same number as a human.
06
Mars is home to Olympus Mons, the tallest known volcano in the solar system, rising about 22 kilometers above the surrounding plains — nearly 2.5 times the height of Mount Everest.
07
Australia's Great Barrier Reef stretches about 2,300 kilometers, making it the largest living structure on Earth — big enough to be seen from space.
08
Lightning strikes somewhere on Earth about 44 times every second, or roughly 8 million times a day, according to NASA estimates.
09
A single red blood cell lives for about 120 days before the body replaces it, and the bone marrow makes roughly 2 million new ones every second.
10
The brain itself has no pain receptors, so surgeons can operate on brain tissue while a patient is fully awake and feels nothing.
11
A day on Mars lasts about 24 hours and 37 minutes, only slightly longer than a day on Earth.
12
Earth speeds around the Sun at about 107,000 kilometers per hour, even though we never feel the motion.
13
Contrary to a popular myth, the Great Wall of China is not visible to the naked eye from space — astronauts have confirmed it blends into the landscape.
14
The periodic table currently lists 118 confirmed chemical elements, though only 94 of them occur naturally on Earth.
15
Research suggests the human nose can distinguish over 1 trillion different scents, far more than the roughly 10,000 once assumed.
16
At a precise combination of temperature and pressure called the triple point, water can exist as solid ice, liquid, and vapor all at the same time.
17
Tiny ocean plants called phytoplankton produce roughly half of the oxygen in Earth's atmosphere, more than all the world's rainforests combined.
18
Any two humans share about 99.9% of their DNA — the tiny 0.1% difference accounts for nearly all the physical variation between people.
19
A cheetah can reach speeds of about 100 kilometers per hour in just a few seconds, making it the fastest land animal on Earth.
20
The tiny pistol shrimp snaps its claw so fast it creates a bubble that collapses louder than a gunshot, reaching about 218 decibels underwater.
21
Scientists estimate that Jupiter's icy moon Europa holds a subsurface ocean with roughly twice as much liquid water as all of Earth's oceans combined.
22
In 1947, engineers working on the Harvard Mark II computer found a real moth trapped in a relay and taped it into their logbook, giving us the term computer 'bug'.
23
The first message ever sent over the ARPANET in 1969 was supposed to be 'LOGIN,' but the system crashed after just the first two letters, 'LO'.
24
The guidance computer that helped land Apollo 11 on the Moon in 1969 had far less processing power than a modern smartphone carries in a pocket today.
25
An adult human body is roughly 60% water by weight, while a newborn baby's body is closer to 78% water.
26
Koalas are one of the very few animals besides primates to have fingerprints, and theirs are so similar to human ones that they have occasionally confused crime-scene investigators.