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The black-footed ferret is one of the most endangered mammals in North America, but new research suggests that these charismatic critters can persist if conservationists think big enough.

Endangered black-footed ferret and its plague-impacted prey need new conservation approaches

Saturday morning cartoons made it seem like all you needed was a national park and a picnic basket to get a visit from Yogi and Boo Boo.   Well, it turns out the real world doesn't operate like Jellystone Park, which came as surprise to at least one recent Yellowstone National Park visitor.   According to Mashable, an employee at Yellowstone National Park Lodges recieved a comment card complaining about the disappointing lack of bear sightings. 

This July 2011 file photo shows a grizzly bear roaming near Beaver Lake in Yellowstone National Park, Wyo.

One of 16 species being tracked by Cornell University's "Celebrate Urban Birds" citizen-science project.

Not Just Sparrows and Pigeons: Cities Harbor 20 Percent of World's Bird Species

Not Just Sparrows and Pigeons: Cities Harbor 20 Percent of World’s Bird Species

Satellite tags, fishing data reveal turtle danger zones - Technology Org

Critically endangered leatherback turtles tracked to reveal danger zones from industrial fishing

Washington designated the western hemlock as the official state tree in 1947.A large evergreen coniferous tree native to the west coast of North America,the western hemlock tree is the largest species of hemlock (growing an average of 50-70 meters tall,and sometimes to 78 meters) with a trunk diameter of up to 2.7 meters.The western hemlock lives a long life(trees over 1200 years old are known).Washington's abundant evergreen forests are the basis for its unofficial nickname:The Evergreen…

Washington designated the western hemlock (Tsuga heterophylla) as the official state tree in a long-lived evergreen tree;

Squirrels will take in orphaned pups if the babies are closely related to the adoptive mother, according to new research. Although adoptions occur among species that live in extended family groups, it's much less common among asocial animals, such as squirrels, who are territorial, live alone and rarely interact with one another. The study also shows squirrels are able to asses which pups they are related to before determining whether to adopt.

A female North American red squirrel moves a newborn pup to a new nest.

New research predicts that rats will continue to grow and fill a 'significant chunk' of Earth's emptying ecospace. Their global influence is likely to grow in the future as larger mammals continue to become extinct.

Rat islands 'a laboratory of future evolution': Rats predicted to fill in Earth's emptying ecospace

Capybara with young. "Given enough time, rats could probably grow to be at least as large as the capybara, the world's largest rodent, that .

Caledonian crow shows problem solving akin to a seven-year-old human

New Caledonian crows may understand how to displace water to receive a reward, with the causal understanding level of a year-old child, according to results published March in the open access journal PLOS ONE .

Image detail for -Human Red and White Blood Cells Science Image. If this is real, it's an amazing shot.

Human Red and White Blood Cells Description: Coloured scanning electron micrograph (SEM) of human blood showing red and white cells. Magnification at an image size of 10 cm wide