Are You Brave Enough To Cross These Death-Defying Bridges?

Confederation Bridge, New Brunswick

This bridge took 5,000 workers to complete, who persevered tirelessly through icy Canadian waters.

There's a word for tapping someone on the opposite shoulder from behind to fool them.
There's a "floating rainforest" in the sea.
Armadillos swallow air to become buoyant when they swim.
You make approximately a teaspoon of tears per hour.