What is always infront of you but can't seen it is riddles​

Whats the biggest sea in the world?

The largest employer of cartographers is the

Look at the diagram showing the different wavelengths in sunlight. which statement describes electromagnetic waves with wavelengths greater than 700 nanometers? they take the form of heat. they can cause skin cancer and sunburn. they are some of the shortest waves. they can be seen by human eyes as visible light.