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

2) Elvis Presley, often referred to as the "King of Rock and Roll," has sold over one billion records worldwide.

3) The word "table" contains two vowels: A and E.

4) The Northern Lights, also known as the Aurora Borealis, are natural light displays that occur in the polar regions due to interactions between the Earth's magnetic field and solar particles.