Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
You can immediately cool down a car that has been sitting under the sun by rolling down the window on one side and opening-closing the door on the other side 5-6 times.
23
On average, a disposable diaper can hold up to 7 pounds of liquid.
22
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
Passengers on the Beijing subway can pay with plastic bottles.
29
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
The 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
94
The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting.
244