Question of the Week
Are the residues from common manual dish washing significantly toxic to humans in the short or long term?
Like with physical exercise, if we practice difficult mental tasks, does our endurance at those tasks improve over time?
Why does a piano's A sharp sound different to a trumpet's A sharp?
Does one or two steps at a time require more energy, and which is better for a work-out?
How did birds survive the dinosaur mass extinction?