23 incredible new technologies you'll see by 2021
The Maya said we're due for a shake-up soon. Turns out, they were right.
Eyjafjallajökull Volcano Photo, Iceland Wallpaper
See a photo of lightning over Eyjafjallajökull volcano by Sigurdur Stefnisson, and download free wallpaper from National Geographic.
The classic physics experiment involving sound, a tube of propane and fire. Created for Flash Forward 2006, but useful in any case where you are not allowed ...
Collatz conjecture - Wikipedia, the free encyclopedia
The is a in named after , who first proposed it in 1937. The conjecture is also known as the , the (after ), (after ), the (after Sir Bryan Thwaites), (after ), or the ; the sequence of numbers involved is referred to as the or , or as .
6174 (number) - Wikipedia, the free encyclopedia
Breathingearth - CO2, birth & death rates by country, simulated...
A visual real-time simulation that displays the carbon dioxide (CO2) emissions, birth rates, and death rates of every country in the world.