A student asked teacher Joe Howard a fairly nonsensical question. How loud would it be if all of the cats in the world meowed at the same time? Turns out it would be pretty darn loud, if the cats were close enough to the...

by Martin Melchior Stream Ecologist Lake Mills, Wisconsin, USA If a tree falls in the forest and no one is there to hear it, does it make a sound? Many have treated this as a philosophical question, with little to s...