Male killer whales hunt more than females

It's hard to tell just how imperilled killer whales are. With several different forms—some of which may even be different species—it's unclear which are at serious risk and which are less vulnerable. But one group is ...

Having stressed out ancestors improves immune response to stress

Having ancestors who were frequently exposed to stressors can improve one's own immune response to stressors, according to Penn State researchers. The results suggest that family history should be considered to predict or ...

Who's tougher? Baby sharks or daddy sharks?

It's not just their teeth and jaws that people find intriguing. It's also their funky shapes and unique skeletal makeup that capture attention. Unlike humans and most land animals, sharks have mineralized cartilage skeletons ...

Swifts ride air currents to catch a free lunch

Once an adult swift (Apus apus) leaves its breeding colony and takes to the air migrating south, it won't touch down again until returning home to nest 10 months later. "Common swifts are exceptional in their level of adaptation ...

Louisiana amphibian shows unique resistance to global disease

Amphibian populations around the world are declining due to a skin disease caused by fungus. However, an amphibian commonly found in Louisiana, the three-toed amphiuma, has shown a resistance to the fungus, in a new study ...

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