1. You Shouldn't use Boiling Water to Make Hot Drinks.
2. Sand Dunes Hum.
They do! http://www.acoollink.com/sand-dunes-hum/ And the bods who spend their days finding out why, er .... well ... they don't know exactly why yet. I'm sure once they get their next multi billion dollar grant they'll suss it out though.
3. Oestrogen Works Like Valium.