The weirdest things we learned this week range from the standards and grading of ketchup to the idea that people were fully-formed inside of sperm before being born. Whose story will be voted "The Weirdest Thing I Learned This Week"?

The Weirdest Thing I Learned This Week is a podcast by Popular Science. Share your weirdest facts and stories with us on Twitter: www.twitter.com/weirdest_thing #weirdestthingpod

Follow our team on Twitter

Rachel Feltman: www.twitter.com/RachelFeltman

Sara Chodosh: www.twitter.com/schodosh

Corinne Iozzio: www.twitter.com/CorinneIOZO

Popular Science: www.twitter.com/PopSci

Theme Music by Billy Cadden: www.twitter.com/billycadden

Edited by Jason Lederman: www.twitter.com/Lederman

Learn more about your ad choices. Visit podcastchoices.com/adchoices