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Sapphires can come in almost any colour except red (these are rubies). Orange sapphires are among the rarest of all sapphires ranging in colour from a brilliant orange to orange-pink.
There are about 100 lightning flashes on Earth every second, or 6,000 every minute!
The James Webb Space Telescope can detect orange and red light, but mostly uses even redder, infrared light.
A scalene triangle has sides of all different lengths, and all different angles.
Diamond pythons are non-venomous, and they constrict their prey to kill them. They can’t kill you, but they will give you a nasty bite if you annoy them too much!
Salt can pull the water out of living cells, in a process called osmosis.
The ‘smiling face with open mouth and tightly closed eyes’ emoji is the world’s most confusing. In a US study, scientists found that half of people thought it was a positive emoji, and half thought it was negative!
The average adult human body contains about 250 grams of salt, roughly the weight of a block of butter. If you don’t have enough salt, your body suffers an electrolyte imbalance called hyponatremia.
It’s expensive to launch things into space, so astronauts recycle as much as they can, including drinking water!
Endemic species can only be found in one place in the world. About 85% of Australian mammals, 45% of Australian birds and almost 90% of Australian freshwater fish are endemic.
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