This is partly due to pollution, but even in the cleanest air the sky is lighter near the horizon due to the effect of earth's atmosphere on sunlight.
Clouds can range in color from brilliant white to almost black. Why?
Learn more about the physics of hot air and why mountain tops are so cold.
There is no place on the moon that is completely dark. Learn why!
Could Archimedes have used mirrors to set Roman ships on fire?
Do you love being the center of attention or a bright, incandescent lamp?
New research suggests that animal populations can actually decipher the amount of plant life in that particular area.
Fogbows are created in much the same way as normal rainbows are. The main difference is the size of the water droplets which affect the light's refraction.
Have you ever seen some shaded plants grow tall and spindly very fast, while ones in sunlight are shorter and thicker? Well there is an answer...
Some plants have parasitic behavior that destroys their plant hosts, but are there benefits too?