When signing a check, you may think you’re signing on the signature line, but if you take a closer look, it’s actually made up of microprinting which says “AUTHORIZED SIGNATURE” over and over again.
If you’re an avid reader of paper books, you may have noticed there are often blank pages at the end of the book. The reason for this is that books are made up of digitally printed and folded sheets of paper called signatures.
Trams and some trains run on a pantograph catenary system where the electricity is transferred from the catenary wire to the locomotive.
In deeper water, the surrounding water pressure is higher, and your lungs would be unable to inflate. A smaller tube reduces the problem of re-inhaling carbon dioxide and the risk of pulmonary edema.