Why Are Eggs ... Egg-Shaped

The video explores why eggs are egg-shaped, discussing two main theories. The first theory suggests that the ovoid shape helps in the egg's passage through the ovaduct, making it easier to lay. The second theory posits that the shape prevents eggs from rolling away, keeping them in the nest. The video concludes that the evolutionary logic of egg shape is not circular but ovoid.

How does the shape of an egg contribute to the likelihood of it staying in a nest when jostled?

What evolutionary logic is suggested by the shape of eggs in cliff-dwelling birds?