in

Human fingers can feel objects as small as….

Human fingers

Human fingers can feel objects as small as 13 nanometers. If your finger was the size of the Earth…

Save

Leave a Reply

Your email address will not be published. Required fields are marked *

water out of thin air

In Peru, there’s a billboard that creates…

flush their toilets with seawater

In Hong Kong, about 80% of residents flush their….