Glass frogs hide their own blood while they sleep.
They concentrate red blood cells in the liver, turning nearly transparent — without the deadly clotting that should follow.
HISTORICAL ARCHIVE
Sources · October 24, 2026
Every claim from this day’s challenge, with its verdict, explanation and sources.
Round 1
The marathon is 42.195 km because of the British royal family.
Sort of: the 1908 London course ran from Windsor Castle to a finish in front of the royal box. That odd distance became the standard in 1921.
Eating lots of carrots gives you superhuman night vision.
Vitamin A fixes deficiency-related night blindness, but extra carrots add nothing beyond normal vision. The myth was WWII RAF propaganda.
Round 2
All of humanity compressed would fit in a sugar cube.
Atoms are ~99.9999999% empty space; squeeze out the void and 8 billion people's matter would fit in a sugar cube — weighing hundreds of millions of tons.
Water boils at 100°C.
Only at sea-level pressure. Boiling happens when vapor pressure matches the air pressure around it, so water boils near 95°C in Denver, around 70°C atop Everest, and above 100°C in a pressure cooker.
Elephants are the only creatures alive today that cannot jump.
Elephants can't jump, but they're far from alone — sloths, tortoises, and plenty of other animals can't either. It's a shared limitation, not an elephant exclusive.
Round 3
A flood of beer once killed eight Londoners.
The 1814 Horse Shoe Brewery vat collapse sent a porter wave through the St Giles slum, crushing homes — a real industrial disaster.
It is impossible to hum while pinching your nose shut.
You can manage a second or two — but humming pushes air out through the nose. Block it, and pressure builds until the vocal cords can't keep vibrating.
Searing meat "seals in the juices."
Searing builds flavor via the Maillard reaction, but meat loses moisture either way — nothing gets sealed.