Can You Spot the Human?
An array of embryo photos—can you guess which one is human? Then try it with photos of different eggs. And sperm.
Which egg is human?
Animal eggs can look like beach balls, peach pits, or strange balloons.
Which sperm is human?
Every sperm is a single swimming cell, with the parent’s DNA packed into its head.
Which embryo is human?
Some embryos look a bit like the animal they’ll eventually become.