Platypus eggs are just a couple of centimetres in size - about the size of a grape. They average 11 mm in diameter. They are small, smooth and leathery, unlike birds' eggs, which are hard-shelled. They weigh just a few grams.
The size of the egg doesn't dictate the strength of the shelll. The type of egg does. Quail eggs are smaller than chicken eggs, but they are usually stronger. Duck eggs are larger than chicken eggs...
Yes. Platypuses are one of only two types of mammals to lay eggs. Fertilised platypus eggs stay in the mother's body for around 28 days. The egg is incubated by the mother curling around it and...