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 Lays turned to Luigi Cherubini. Lays had repeatedly supported Cherubini when Napoleon had shown signs of dislike for the composer. Cherubini had now become one of the leading figures in the musical establishment under the Restoration. He immediately intervened on Lays's behalf, but all he could obtain from Ferté was the advice that the singer should go on a tour of the provinces as a way of supplementing his income.Having obtained leave of absence, Lays appeared in Nancy (where performances were interrupted by the death of the leading soprano) and Strasbourg, where Lays himself was obliged to interrupt them with