The reason it's smarter to store your eggs with the fat end up is that the egg itself does not completely fill the interior of the shell.
Let’s say you hard-boiled some eggs last night to make egg salad. But today, when you open the fridge, you discover that a helpful family member has put them right back in the carton along with the raw ones. Without cracking the eggs open, how can you figure out which is which?
Today on A Moment of Science, another take on sibling rivalry. Sibling rivalry among sharks, that is.