There is no doubt humans have left a lasting impact on the environment since the start of the Industrial Revolution. But a new study suggests people were leaving their mark much earlier: Settlers in Madagascar set forests ablaze 1,000 years ago to make room for cattle pastures.
American pikas prefer to live in cold, mountainous habitats. As climate change brings warmer temperatures, researchers believe the key to their survival will be remaining in close-knit patches.
Based on current rates of ocean acidification, scientists predict oceans will be much quieter in the future -- making it more difficult for baby fish, who rely on auditory cues as a primary method of navigation, to find their way home.
Earth's largest apes died off because they could not adapt to a new diet forced by climate change 100,000 years ago.
Asian carp pose a major risk to Lake Erie's ecosystem. New computer models suggest these invasive fish could soon throw off the balance of the natural food chain and account for nearly a third of the lake's total fish population.
Global salt marsh erosion is largely driven by regular weather patterns, rather than the occasional violent storm.
A New England songbird species known as Bicknell's Thrush is threatened by both climate change and competition. Not only is their habitat being shifted to higher elevations, limiting their range along the Adirondack Mountains, but their behaviorally dominant relatives are pushing them uphill, too.
Crocodiles may not be able to adjust to warming waters, researchers say. A recent study found saltwater crocodiles tend to take shorter dives when waters exceed 31.5 degrees Celsius. This could have significant impact on the species' survival.
Marine animals are altering their diets and natural habitat range as a result of climate change. For instance, melting sea ice is opening new waters to humpback and fin whales, which could lead to increased food competition among the areas' native species.
Following the 1964 Alaskan earthquake, marine-dwelling three-spine stickleback fish had to rapidly evolve to live in freshwater ponds. This sheds light on how other species may be impacted by climate change.
Miconia trees originally planted in botanical gardens for their beautiful purple-colored leaves have become world-renowned invasive species.
More than 90 percent of the world's migrating birds suffer from habitat loss along their long and remarkable journeys, so researchers are calling for increased collaborative and international efforts.
A rare Eastern Pacific green sea turtle was recently seen swimming in Northern California's San Joaquin River far from its home near Mexico. Researcher believe the animals have been lured north by warmer El Niño waters and that this may be dangerous for the species if more follow.
Invasive species are escaping from fish and shellfish farms in Europe and being released inappropriately into rivers and lakes. As a result, alien fish are wreaking havoc on native populations.
Delmarva Peninsula fox squirrels have made a successful recovery and are safe from extinction. Recent population growths justify the animal's happy exit from the U.S. Fish and Wildlife Service's Endangered Species List.