Earth Matters

Salmon Shark Facts (Lamna ditropis)

Salmon sharks (Lamna ditropis) are large, powerful, warm-bodied (endothermic), and streamlined predators adapted for high-speed swimming. Reports from the U.S. Navy have clocked salmon sharks exceeding 50 knots. This would make the salmon shark one of the fastest fish...

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Alaskan Brown Bear Ecology

As large carnivores, Alaska brown bears range over great expanses of land, sometimes as much as 150 square miles for a single bear. In addition, brown bears depend upon such land features and associated animals and plants as alpine, slopes, sedge meadows, salmon...

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Ozone Depletion

The 1985 report of the discovery of an "ozone hole" over Antarctica focused attention on the idea that humans can have a significant impact on the global environment. This discovery, along with evidence that ozone is being lost at nearly all latitudes outside the...

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Persistent Organic Pollutants (POPs)

The production and release of vast quantities of novel synthetic chemicals over the past 75 years has proved to be a great global experiment—one that now involves all life. Even before the Chemical Revolution moved into high gear at the end of World War II, the first...

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Predator Conservation Network

The Predator Conservation Network is dedicated to revealing the importance of predators and dispelling myths about these important species. Predators and Ecosystems Predators can have a stabilizing effect on an ecosystem, a characteristics of a healthy ecosystem. A...

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Forest Fires

The past decade has seen an unusual number of large, stand replacing fires in the western forests of the United States.  They are unusual in that tree ring data from the time period 1500-1900 shows a trend of low intensity fires occurring on a frequent basis that...

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9 Fascinating Real Hybrid Animals

Mother Nature generally expresses her displeasure over anyone messing with her original creations through hybridizing. First, most hybrids are not even possible - they live only in the imagination of creatives that have mastered Photoshop. Second, many hybrids that...

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10 Largest Dog Breeds in the World

The history behind the largest dog breeds often reveals dogs bred to be ancient guardians, fierce hunting hounds or royal companions. While some owners in recent years prefer smaller dog breeds for city living, size and strength have historically been desirable...

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