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Category: Earth

Is the Antarctic Ozone Hole Healing? What the Latest Evidence Shows

Yes—the weight of evidence indicates that the Antarctic ozone hole is beginning a slow, uneven recovery. Large holes can still occur in individual years because weather, volcanic material, wildfire smoke…

How big is a polar bear? Height, length and weight by sex

Adult male polar bears usually weigh about 350–590 kg (770–1,300 lb), roughly four to six and a half times the weight of an average American man; adult females usually weigh…

What is underneath the ice in Antarctica?

Antarctica ice sheets hold a vast amount of lakes underneath, these growing and shrinking lakes are the real gems of intensely cold water. There are more than 400 known lakes…

How Much Oxygen Does Coral Reefs Produce?

Coral reefs are complex structures underwater deposited by corals. Corals are immobile small marine invertebrate animals that take root on the ocean floor. They are colonial animals and classified in…

Why Are Coral Reefs Important – Benefit of Coral Reefs

Coral reefs are huge structures underwater that are deposited and built by coral polyps. While corals are marine invertebrates and colonial animals that belong to the class Anthozoa and phylum…