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The Great Permian Extinction

More than 250 million years ago, when the current continents formed a single land mass, known as the Pangea and there was one super-ocean called Panthalassa, something extraordinary happened. Nearly all life on Earth was wiped out. Over 90% of all marine species and over 70% of terrestrial species went extinct; only their fossils remained to tell ...

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PermianExtinction
Geology

Salty Remnants At Death Valley's Badwater

Beneath the dark shadows of the Black Mountains, a great, extraordinarily flat expanse of shimmering white spreads out before you. You are at Badwater, at -282 feet it is the lowest spot in the ... Continue reading

SaltyRemnantsAtDeathValley
Geology

Was That The Big One? Depends On How You Measured It.

The severity of an earthquake can be expressed in terms of both intensity and magnitude. However, the two terms are quite different, and they are often confused. Intensity is based on the observed ... Continue reading

TheBigOne
Geology

Submarine Volcanoes

Submarine volcanoes and volcanic vents are common features on certain zones of the ocean floor. Some are active at the present time and, in shallow water, disclose their presence by blasting steam and ... Continue reading

SubmarineVolcanoes
Biology

The Journey of the Monarchs

The life of Monarch butterflies is an amazing one. They develop as caterpillars from the roughly 400 eggs each mother lays on the underside of milkweed plant leaves. Then they spend their brief lives ... Continue reading

MonarchButterflies

What's In Your Water?

WaterSewageThe United States has strict policies on water treatment systems and sewage drainage, but what about other countries? 'Don't drink the water' is the first thing most people hear when they tell their friends they're going to Mexico. So what exactly is in the water and how does it get there? Do Mexicans get sick from their water too?

As water runs through watersheds, it picks up microorganisms, such as E.coli, Cryptosporidium, and Giardia from cow waste and Salmonella from chicken waste. These organisms, when taken in by humans, can cause flu-like symptoms such as fever, vomiting, and diarrhea. Most groundwater is considered to be safe for drinking since it runs through layers of dirt which filter out harmful microorganisms. In the United States, any raw human sewage is required to be treated. Virtually all water has some microorganisms in it, harmful or harmless and in varying amounts. We are used to the water where we live and most people don't become ill from drinking the water they have drunk all their life. So why do we get sick from drinking Mexico's water?

The main reason people from the United States become ill from drinking Mexico's water is because we are not used to the amount or kinds of microorganisms present in their water. The people who live in Mexico are almost immune to the microbes present in their drinking water. So, why are their water supplies so polluted? Their water treatment facilities are not advanced; therefore, large investments are required to improve the quality of Mexico's water.