› added 11 years ago

254

TIL used pizza boxes are not recyclable due to grease.

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via reddit.com

LZD0 TIL that around half of the USA’s nuclear arsenal is inside of 14 submarines.
v15YK TIL Petting a dog or cat or other furry pets releases oxytocin (the “cuddle hormone”), which creates instant happiness. Oxytocin also lowers blood pressure and reduces stress levels.
e0DeE Not getting eaten is at the top of the to-do list for most members of the animal kingdom. Now, a new study suggests several species of dolphins can tell when they’re in danger of becoming a killer whale’s dinner—simply by eavesdropping on their calls.
XEJ5E TIL that the morning singing of birds is called the "dawn chorus". It is mostly male birds that sing in the morning and it is theorized that they do so to show fitness, the air and low ambient noise allows for clearer signal, and it's too dark to really do anything else.
69WaJ TIL a McDonnell Douglas DC-10 plane was flown past its design limits, rotating nearly upside down (140°) and reaching speeds the gauges couldn't measure. It also landed 35k lbs/16k kgs over the maximum landing weight. However, the plane soldiered on for 28 more years after repairs.