Answers to questions about chemistry, matter, gases, fuels, green chemistry, nanotechnology...
Could we eat aliens?
Seats are weighty, but would it make much of a saving?
Water contains hydrogen and oxygen, both of which are important in combustion, so why is it used to put out fires?
Why don't you get thrown backwards when you switch on your torch? Kerstin Göpfrich found out from Dr Anna Lombardi.
Could the testing of nuclear bombs lead to earthquakes?
This time, Kevin asked why line drying makes clothes rougher and stiffer than tumble drying...