Happy iPhone day to everyone getting their new handset. (Mine is still about a week away.) Today YouTube is lit up with people doing things like dunking their iPhone 7 in coffee and taking it in the pool (3.5 feet deep!) and the phones are still working. My favorite is the iFixit ongoing stress test. As I write this, iFixit's iPhone has been underwater for 4 hours and is still working fine. This doesn't mean the new phone is an underwater camera so much as the next time you fall in the pool or drop it in water, you're probably fine.

We're going to drop an iPhone 7 into our fish tank to see how long it survives-for science. Apple has listed the phone as IP67 water resistant, which should mean that it can survive at one meter underwater for up to half an hour. How long will it last in our tank?