When you lay an ostrich egg next to chicken, goose, and duck eggs, it's a bit like looking at a set of Russian matryoshka dolls, those cute little wooden moppets that nest snuggly inside of each other ...

A well-known riddle compares an egg to treasure, asking: A box without hinges, key or a lid, yet inside golden treasure is hid. What am I? And for archaeologists in Israel, eight prehistoric ostrich ...