I'm here from all, sorry, but "what are mathematical constants" is a funny question. Like those heavily edited videos where they ask people on holiday stupid questions, and they only show the stupid answers. Except you might not have to edit this one.
"It's a big math stoppage. It's like the speed of light, but the speed of sound... does sound travel in space? HEY WILMA! DOES SOUND TRAVEL IN SPACE?"