The Eiffel Tower can be about 6 inches taller in summer because metal expands in heat.

Cucumbers are more than 95% water.

Ladybugs flash their bright colors to warn birds that they taste bad.

Some parrots can live for more than 60 years.

A day on Mars is only a little longer than a day on Earth.

Humans share their birthday with millions of other people around the world.

Mount Everest is the tallest mountain above sea level.