By: Dr Pandula Siribaddana
Oceanography is a science which dates back many centuries where humans undertook sea voyages for the first time. The study of waves and other superficial parameters also dates back to the time of Aristotle. However, it was only a few decades back that oceanography was...
Lava flows and ash spews detected at Alaska's Cleveland and Pavlof volcanoes
By: Leigh Goessl
Two Alaskan volcanoes are seeing increased activity as levels of ash, lava spews and rumblings pick up in frequency. Notable amplified seismic activity has been documented at both the Cleveland and Pavlof volcanoes. While experts are having a difficult time observing the two volcanoes due...
What causes clouds to sometimes appear black
By: Jose Juan Gutierrez
Clouds are formed when water vapor stemming from the surface of oceans, rivers and lakes evaporates, rises and reaches the dew point in the upper atmosphere. the condensation of water vapor creates the clouds. Sometimes, a cloud may appear dark or dark gray in its...
By: Robin Lamb
A pocket of ancient water discovered in the depths of a Canadian goldmine may provide vital clues about the way life evolved on Earth. Scientists from universities in Britain and Canada say that the water is at least 1.5 billion years old - and...
By: Retha Boswell
Antarctica is covered by a 1.6 kilometer (1 mile) deep sheet of ice, but not quite all of it. The McMurdo Dry Valleys form an unusual region, resembling the surface of Mars. The ice-free valleys stand out with striking contrast to the surrounding ice...
By: Chris Wiegard
In recent years, scientists have noticed signs of damage in coral reefs. These signs are very widespread-in fact they can be seen almost everywhere in the oceans around planet Earth. Some reefs appear damaged, while others are "bleached"- turned white. This disturbing realization has prompted...
By: Jose Juan Gutierrez
Jet streams are very fast moving air currents flowing in narrow paths in the Earth´s atmosphere. Jet streams are several hundreds of miles long and less than one mile thick. Jet streams form in a region between the troposphere and the stratosphere called the...
When and where do tornadoes most frequently occur?
By: Erika Beyer
A tornado is part of a convective storm which is not limited to any specific geographic location (barring Antarctica). Generally, the most favorable environment for tornadoes is between 30 and 50 degrees in northern and southern latitudes. Heavy storm activity, which causes tornadoes occur when...
By: Vonda J. Sines
To many people, the Grand Canyon is a breathtaking spot to visit on vacation. For Colorado River enthusiasts, it’s nature at its most ferocious. Geologists are in love with it. This attraction has been so popular that in 1997, it became one of the...
By: D. Vogt
Meteor strikes are one of the most surprising causes of diamond formation on the surface of the Earth. Most sources of diamonds today were formed by the geological processes of the Earth itself, and meteorites sometimes carry small quantities of tiny diamonds to Earth from...

 

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