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 to "Premiers Sujets" (leading artistes), the highest rank in the company hierarchy. A long-time Freemason and an avid reader of Rousseau, after the outbreak of the French Revolution in 1789 Lays joined the Jacobin Club under the patronage of his old friend Barère. Lays was a passionate believer in the ideals of the Revolution, promoting them among the members of the Opéra company, which had been renamed Théatre des Arts. This was not enough, however, to prevent his arrest in 1792 as a suspected royalist, on the grounds that he had been a leading singer in the Queen's concerts and