Home pregnancy tests that use colored streaks to indicate positive results may display an evaporation line (evap line). This is a colorless streak that occurs when urine dries on the test strip.

Three locations in Oregon and one each in Idaho and Nevada have been selected as potential sites for a part of a $400 million ...

Supercells are the king of thunderstorms. They can tower 10 or more miles tall, spin like a top and produce the most extreme weather on the planet. They drop hail the size of melons, can spawn ...