11/26/2025
A cloud weighs around a million tonnes. A cloud typically has a volume of around 1km3 and a density of around 1.003kg per m3 – that's a density that’s around 0.4 per cent lower than the air surrounding it (this is how they are able to float).
Giraffes are 30 times more likely to get hit by lightning than people. True, there are only five well-documented fatal lightning strikes on giraffes between 1996 and 2010. But due to the population of the species being just 140,000 during this time, it makes for about 0.003 lightning deaths per thousand giraffes each year. This is 30 times the equivalent fatality rate for humans.
Identical twins don’t have the same fingerprints. You can’t blame your crimes on your twin, after all. This is because environmental factors during development in the womb (umbilical cord length, position in the womb, and the rate of finger growth) affect your fingerprint.
Earth’s rotation is changing speed. It's actually slowing. This means that, on average, the length of a day increases by around 1.8 seconds per century. 600 million years ago a day lasted just 21 hours.
Earlobes have no biological purpose. While they are rich in nerve endings and may play a role in social bonding, many scientists argue that earlobes don’t have any true biological purpose.
Your brain is constantly eating itself. This process is called phagocytosis, where cells envelop and consume smaller cells or molecules to remove them from the system. Don’t worry! Phagocytosis isn't harmful, but actually helps preserve your grey matter.
The largest piece of fossilised dinosaur poo discovered is over 30cm long and over two litres in volume. Believed to be a Tyrannosaurus rex turd, the fossilised dung (also named a 'coprolite') is helping scientists better understand what the dinosaur ate.
Mars isn’t actually round. Unlike any other rocky planet in the Solar System, Mars is actually shaped like a rugby ball, but with different sizes along all three axes.
There’s no such thing as zero-calorie foods. Even low-calorie foods, such as celery and watercress, contain more energy than the body needs to process them.
The Universe's average colour is called 'Cosmic latte'. In a 2002 study, astronomers found that the light coming from galaxies averaged into a beige colour that’s close to white.
Animals can experience time differently from humans. To smaller animals, the world around them moves more slowly compared to humans. Salamanders and lizards, for example, experience time more slowly than cats and dogs. This is because the perception of time depends on how quickly the brain can process incoming information.
Water might not be wet. This is because most scientists define wetness as a liquid’s ability to maintain contact with a solid surface, meaning that water itself is not wet, but can make other objects wet.
Most people stroke cats the wrong way. Research shows they often just tolerate it for the food and attention. The safest spots? Under the chin, cheeks and base of the ears. The worst? Their belly and the base of their tail – touch there and you’re more likely to annoy them than bond with them.
A chicken once lived for 18 months without a head. Mike the chicken's incredible feat was recorded back in the 1940s in the USA. He survived as his jugular vein and most of his brainstem were left mostly intact, ensuring just enough brain function remained for survival. In the majority of cases, a headless chicken dies in a matter of minutes.
The raw ingredients of a human body would cost over £116,000. But if you’re prepared to do the refining yourself, a body could cost a lot less – under £100 in fact.
All the world’s bacteria stacked on top of each other would stretch for 10 billion light-years. Together, Earth's 0.001mm-long microbes could wrap around the Milky Way over 20,000 times.
