The largest waterfall on Earth is underwater.
The Denmark Strait cataract drops ~3.5 km as cold water sinks beneath warmer water — taller than any above-water fall.
HISTORICAL ARCHIVE
Sources · October 22, 2026
Every claim from this day’s challenge, with its verdict, explanation and sources.
Round 1
You can spell the whole alphabet using U.S. state names.
Almost: every letter appears in at least one state name — except Q.
Shaving makes hair grow back thicker, darker, and faster.
A razor leaves a blunt tip that feels stubbly against the skin; the follicle is untouched, so rate and thickness never change.
Round 2
Hundreds of people danced uncontrollably for days in 1518.
The Strasbourg dancing plague sent citizens moving for weeks; mass psychogenic illness is the leading explanation — though records are murky.
A pound of feathers weighs more than a pound of gold.
Precious metals use Troy weight: a "pound" of gold is 12 oz (~373 g), while feathers use avoirdupois: 16 oz (~453 g).
Cracking your knuckles causes arthritis.
The pop is gas bubbles bursting in synovial fluid; multiple long-term studies show no link to joint degeneration.
Round 3
Every properly shuffled deck of cards is almost certainly one-of-a-kind.
52! orderings — an 8 followed by 67 zeros — exceed everything ever shuffled by margins the universe cannot touch.
Angel Falls is the tallest waterfall on Earth.
On land, yes — 979 m with an 807 m uninterrupted drop. But the underwater Denmark Strait cataract plunges about 3.5 km.
Throwing rice at weddings kills birds.
Birds eat raw grain in nature constantly; rice cannot expand enough in a bird's stomach to cause harm.