askscience

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A room has only a single door access. There is no ventilation leading into it. It is attached to a well air conditioned building. Will this room best be cooled by a fan blowing cold air through the door into it or blowing hot air out of it? Why?	1
What leaves a bigger environmental footprint: writing a note to oneself on a PostIt or texting a digital note to yourself on a smartphone?	1
I just read that the coldest known star is a brown dwarf that is no hotter than a hot cup of coffee -- what would happen if you put some of it in your mouth?	1
Are binary and trinary star systems more or less likely to have "earth like" rocky planets in a Goldilocks zone than systems with only one star?	1
If nothing can travel faster than the speed of light, how did the universe expand to the size of a galaxy in the first three minutes after the Big Bang?	1
With the just announced discovery of Proxima B, a nearby earthlike planet with 1.3x the mass of Earth, what could we expect the physical/health consequences of humans living a full lifespan from birth to old age in 1.3x Earth gravity to be?	1
Can dolphins of different species understand each other's language?	1
Is the matter that comprises subatomic particles analogous to a solid, or more like another of the states of matter?	1
Air travel is the safest way to travel (lowest chance of an accident), but space travel is one of the most dangerous. Which aspects of space travel in particular make it so much riskier from an engineering perspective?	1
Why do small children like to watch the same movie/show over and over again often to the exclusion of anything else, while adults (and even adolescents) typically don't do that?	1

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