• Arts
• Business
• Computers
• Games
• Health
• Home
• Kids and Teens
• News
• Recreation
• Reference
• Regional
• Science
• Shopping
• Society
• Sports

Science

• 1421
• Earth Observatory: New York City Temperature and Vegetation
• Contains pictures from space that show how vegetation such as trees can help keep a city cool.

• 1422
• Green Flash
• Explains the physics of why this occurs.

• 1423
• Green Flash
• Several pictures of green flashes, with an explanation of why it occurs.

• 1424
• Green Flash
• Explains the different types of green flashes, how they form, their appearance, an image gallery and how to see them.

• 1425
• Wikipedia: Green Flash
• Explains what they are, and when to see them.

• 1426
• An Introduction to Mirages
• Contains background information, the superior mirage, and the details of refraction.

• 1427
• How Mirages Work
• Learn what causes different kinds of mirages.

• 1428
• Inferior Mirages (Water)
• Several pictures of mirages.

• 1429
• Mirages in the Sky
• Tells several stories of when people might see mirages.

• 1430
• Mirages: A Primer
• Explains what mirages are and why they occur. Includes diagrams.

• 1431
• Arctic Treats: Sun Dogs
• Offers an illustrated look at sun dogs.

• 1432
• Parhelions or Sun Dogs
• Diagrams and pictures explain how sun dogs form.

• 1433
• Sun Dog
• Contains several pictures.

• 1434
• Sundogs: Mock Suns or Parhelia
• Explains the physics of why they occur, with a diagram.

• 1435
• Sundogs: Parhelia
• Features images of sun dogs and tells why they occur.

• 1436
• Wikipedia: Sun Dog
• Encyclopedia article describing how sun dogs form.

• 1437
• Sun pillars
• Contains a few pictures.

• 1438
• The Weather Doctor - Light Pillars
• Explains how pillars form, with many diagrams.

• 1439
• Upper Sun Pillar
• Contains a description and formation of sun pillars.

• 1440
• Wikimedia Commons: Sun Pillars
• Contains pictures of sun pillars.