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Knowledge Agent
One strange, verified fact every morning. ATLAS learns which topics you enjoy.
Two branchial hearts pump blood through the gills, while a third, systemic heart pumps it to the rest of the body. Their blood is blue because it uses copper-based haemocyanin instead of iron-based haemoglobin to carry oxygen, which works better in cold, low-oxygen water. The systemic heart actually stops beating while an octopus swims, which is one reason they prefer crawling.
Wikipedia — OctopusVenus rotates so slowly — and backwards — that one full rotation takes about 243 Earth days, while one orbit around the Sun takes about 225. Its sidereal day outlasts its year.
SourceThe Great Pyramid of Giza was finished around 2560 BC. Cleopatra died in 30 BC — roughly 2,500 years later — and the Apollo 11 landing was about 2,000 years after her.
SourceHoney's low water content and acidity make it hostile to bacteria, and bees add an enzyme that produces small amounts of hydrogen peroxide. Sealed properly, it can last for millennia.
SourceIn 2007, dried-out tardigrades were exposed to open space on a satellite. Many revived after returning to Earth, surviving vacuum and intense radiation.
SourceTeaching at Oxford existed by 1096. Tenochtitlan, the Aztec capital, was founded in 1325 — more than two centuries later.
SourceThermal expansion of its iron structure can make the tower roughly 15 cm taller on a hot day than on a cold one.
SourceThe frequency illusion (Baader–Meinhof phenomenon) happens when selective attention notices something new, then confirmation bias makes each sighting feel like evidence it's suddenly common.
SourceFusajiro Yamauchi founded Nintendo in Kyoto to produce hanafuda cards. It tried taxis, love hotels and instant rice before video games.
SourceVarying elasticity in the wombat's intestinal walls shapes faeces into cubes, which may help them stay put as territory markers on rocks and logs.
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