It’s a mystery that goes back to the days of Aristotle, flummoxing biologists and mathematicians for centuries: Why do birds’ eggs come in so many different shapes and sizes?
Why are owl eggs almost perfectly round, while hummingbird eggs look like tiny watermelons? And why are still other eggs pointy, but only on one end?
Now researchers have made a serious attempt to answer this deceptively simple question. Their conclusion: Egg shape is related to how much time a bird spends in flight, according to a report in Friday’s edition of the journal Science.
Scientists have long...