Become a tiny sperm cell and race through the body to reach the egg — then grow a baby in the womb week by week and build your own twins in the Twins Lab! Predict what happens next, watch the real science unfold, and score 100 points.
Become a tiny sperm cell and race through the body to reach the egg — then grow a baby in the womb week by week and build your own twins in the Twins Lab! Predict what happens next, watch the real science unfold, and score 100 points.