Why is the sky dark at night? You might think the answer is obvious - the sun isn't up! But the only reason the sky looks blue during the day is that sunlight scatters off of the atmosphere -...
Canada and the United States share the longest, straightest, possibly boringest border in the world. But, look closer, and there's plenty of bizarreness to be found. While these sister nations...
Every day the world consumes 300 tones of caffeine -- enough for one cup of coffee for every man, woman and child. The world's largest buyer of coffee, the US, has to import nearly all of this...