While calorie counts vary with pizza toppings and recipes, a slice of cheese pizza (weighing about 103 grams) is around 272 calories, according to LiveStrong.com. A calorie counting website averaged a slice of cheese pizza at nearly 250 calories. Indulge wisely and check out these eight pizza deals for Pi Day. Read: The Best Pi Day Jokes. Villa Italian Kitchen: Customers can get a Neapolitan cheese pizza for $3.14 with a coupon.
The Navy's nuclear-powered submarines can stay submerged for long periods of time. Air is isn't a problem as their make their own oxygen and keep the air clean. The limits on how long they can stay underwater are food and supplies. Submarines generally stock a 90-day supply of food, so they can spend three months underwater. The diesel-powered submarines (not now used by the Navy) had a limit of several days submerged.
According to the Sea Turtle Conservancy, sea turtles can hold their breath for much longer periods of time. A sea turtle that is not engaged in strenuous activity is able to hold its breath underwater for anywhere from 4 to 7 hours. However, when a sea turtle is hibernating, it may stay underwater for several months at a time. Turtles are able to stay underwater for long periods because of their ability to metabolize oxygen at a very low rate.