Earth's magnetic field has flipped many times before, and scientists say it will flip again (though probably not in our lifetime). While it might not be catastrophic, a major change in the magnetic field would present a special set of problems.
Picture this: You're floating through space, minding your own business, when some super-scary alien attacks you. Clearly you need to defend yourself, but all you have is a handgun. Will it do you any good, or are you mincemeat?
Coral reefs are pretty cool. More than just snorkeling destinations, they shelter tons of marine life — creatures many of us depend on for food and medicine. So what would happen if the coral reefs disappeared? Here's a hint: It isn't good.
Cockroaches are among the most reviled creatures on the planet. They bring bacteria and allergens wherever they go — along with severe cases of the creepy crawlies. But would we really want to live in a world devoid of these little pests?
Snakes get a bad rep. They've become so associated with dishonesty, deception and temptation that many might prefer the world just rid itself of them altogether. But creepy as they may be, it turns out that snakes are pretty handy to have around.
Imagine going outside in the summer and not being eaten alive by mosquitoes. Yeah, no mosquitoes! Well, don't celebrate just yet, because a world with no mosquitoes might have a radically different food chain.
If you don't recycle, you should. If you do recycle, you should do more. And what if everybody in the world started to recycle? At the very least, it would help us attack that enormous plastic patch in the middle of the ocean.