There is a new video of Koreans trying to group pictures of popular Western celebrities and the results were overwhelming. Experts call it the 'cross-race-effect'. It is a theory that we are biased by our genetic code and can inherently recognize members of our own ethnic groups better than others.
The Koreans were given pictures of people like Scarlett Johansson, Taylor Swift, Keira Knightley, Natalie Portman, and Amber Heard, then asked to group the pictures by person. Only one participant was able to group the pictures successfully.
If we give you just two, can you tell us who you think is hotter, Scarlett Johansson or Amber Heard?