1) The speed of a sneeze can reach up to 100 miles per hour (160 kilometers per hour).

2) The Eiffel Tower can be 15 cm taller during the summer due to thermal expansion.

3) The world's oldest known living tree is a bristlecone pine named "Methuselah" in California, estimated to be over 4,800 years old.

4) Male seahorses are the ones who give birth to their offspring.