Tuesday, October 20, 2026 · Played it? Here's how rare each one really was.
Studies from the 1940s–50s; 65% to 81% depending on the study.
1 in 1.4 people 73.0%
Studies found 65% to 81% of people can roll their tongue; this uses the middle, about 73%.
Fun fact: It isn't simple genetics: in 7 of 33 pairs of identical twins, one twin could roll their tongue and the other couldn't.
Source: John McDonald, University of Delaware, Myths of Human Genetics
Pooled from 26 studies, 2013 meta-analysis.
1 in 4.9 people 20.2%
A 2013 meta-analysis found a pooled absence rate of 20.25%, higher than the commonly quoted 15%.
Fun fact: In a class of 30, expect about 6 people without it. Surprisingly, the analysis found it missing more often on the right side.
Source: Yammine, Clinical Anatomy (2013)
Steam's 'Elden Ring' achievement (Obtained all achievements), October 2026.
1 in 9.5 players 10.5%
10.5% of Steam owners have the 'Elden Ring' achievement for getting all the others, as of October 2026.
Fun fact: In a room of 20 owners, expect about 2 completionists.
Source: Steam global achievement stats (accessed 15 Oct 2026): Elden Ring
Standard IQ scale: average 100, standard deviation 15.
1 in 741 people 0.13%
145 is three standard deviations up, the top 0.13%. Each extra 15 points makes it far rarer, not just a bit rarer.
Fun fact: A town of 10,000 people would have about 13 at this level.
Source: Math: normal curve, z = 3
One 13-card hand from a shuffled 52-card deck.
1 in 158,753,389,900 hands less than 0.0001%
There are 635,013,559,600 possible 13-card hands, and 4 of them are a complete suit.
Fun fact: Deal one hand a second, nonstop, and you'd wait about 5,000 years on average to see it.
Source: Math: C(52,13) ÷ 4 = 158,753,389,900