Mysterious Mirror Twins

Excited for the August 21 eclipse? Visit our Eclipse 2017 page to explore the science, history, and myths of the event. The Curiosity team will be viewing the eclipse alongside NASA in Carbondale, Illinois. Follow us on Facebook for live videos, trivia, and interviews on the big day.

Identical twins occur when a single fertilized egg splits into two embryos in the first four to eight days. Mirror twins are believed to occur when this split happens between nine and 12 days, after the asymmetry is already established.

Share the knowledge!

If you liked this you'll love our podcast! Check it out on iTunes, Stitcher, Google Play Music, SoundCloud, search 'curiosity' on your favorite podcast app or add the RSS Feed URL.

Advertisement