You open up your cupboard, or take a peek in your camping cooking supplies, and you find a bunch of old ketchup packets. Are they still good to eat? How long do they last? Let’s find out.
It's almost impossible to secure yourself against a food raid from bears. That's because these giant mammals are clever tool users, and they share their tech knowledge with other bears nearby. As a result, bear-proofing technology rarely works for more than a couple of decades before every bear knows how to crack it.