Egg embryo is adequately developed it hatches, i.e. breaks out of the egg's shell. Some embryos have a temporary egg tooth they use to crack, pip, or break the eggshell or covering. The largest recorded egg is from a whale shark, and was in size. Whale shark eggs typically hatch within the mother. At and up to , the ostrich egg is the largest egg of any living bird, though the extinct elephant bird and some dinosaurs laid larger eggs. The bee hummingbird produces the smallest known bird egg, which weighs half of a gram (around 0.02 oz). Some eggs laid
François Lays François Lays François Lay, better known under the stage name Lays (14 February 1758 – 30 March 1831), was a French baritone and tenor opera singer. Originally destined for a career in the church, Lays was recruited by the Paris Opéra in 1779. He soon became a leading member of the company, in spite of quarrels with the management. Lays enthusiastically welcomed the French Revolution and became involved in politics with the encouragement of his friend Bertrand Barère. Barère's downfall led to Lays being imprisoned briefly, but he soon won back the public and secured the patronage of Napoleon, at