Saint Patrick's Day began as a "feast day". To honor him, Christians could put aside their Lenten restrictions on food and alcohol consumption, which is why excessive drinking has become linked to the celebration.
The largest known living organism is an aspen grove.
A single lightning bolt has enough energy to toast 100,000 slices of bread.
The Japanese created a smoke alarm for those who can't hear, which pumps super-spicy wasabi mist into the air to alert them.