Conservation Strategies Must Shift With Global Environmental Change, Ecologists Urge
Conservation Strategies Must Shift With Global Environmental Change, Ecologists Urge
Traditional ecosystems in which communities of plants and animals have co-evolved and are interdependent are increasingly rare, due to human-induced ecosystem changes. As a result, historical assessments of ecosystem health are often inaccurate. Scientists are now suggesting that efforts should focus less on restoring ecosystems to their original state and more on sustaining new, healthy ecosystems that are resilient to further environmental change. Accepting some permanent changes may increase health of ecosystems.
Managing Chronic Pain: When Does Morphine Become Less Effective?
Opioids, such as morphine, are effective and widely used drugs for the control of pain. However, tolerance to opioids can develop with repeated administration (that is, higher and higher doses of the drug are required to achieve the same level of pain relief).
Barnacles Go To Great Lengths To Mate
Compelled to mate, yet firmly attached to the rock, barnacles have evolved the longest penis of any animal for their size -- up to 8 times their body length -- so they can find and fertilize distant neighbors. Biologists have shown that barnacles appear to have acquired the capacity to change the size and shape of their penises to closely match local wave conditions.
Gotta Have Heart: Crocodilians Bypass Their Lungs To Improve Digestion
Crocodiles are among nature's most fearsome predators. When the opportunity arises, crocodilians will gorge, voluntarily consuming meals weighing 23% of their own body weight. This is analogous to a 130-pound woman eating, at one sitting, a hamburger weighing 30 pounds. New research on American alligators' circulation systems finds that crocodilians bypass their lungs to improve digestion.
Could Statins Prevent Cancer?
A new study evaluates the relationship between statin use and cancer incidence. ACS experts say more research is needed.
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