To understand the biological underpinnings of skin and hair pigmentation and related diseases such as albinism or melanoma, scientists and doctors need quantitative, three-dimensional information about the architecture, content and location of pigment cells. Penn State College of Medicine researchers have developed a new technique that allows scientists to visualize every cell containing melanin pigment in 3D in whole zebrafish.

A tiger shark's life history is one painted with broad brush strokes. These sharks are generalists of the boldest kind. Found in tropical and subtropical seas worldwide, they live in a range of ocean habitats from shallow coastal waters to mysterious depths far offshore. Their diet is equally unfussy and has become the stuff of legend, its menu of marine mammals, fish, seabirds and other sharks peppered with garbage and terrestrial animals, according to some reports. Everything points to the […]

Best known as the cause of a sexually transmitted infection, Chlamydiae are a diverse group of pathogens whose strains can also lead to pneumonia and blindness.

The first complete assessment of extinction risk for all Australian sharks, rays and ghost sharks reveals Australia is home to more than a quarter of shark species on the planet, but 12 percent of those are at risk of extinction.

A family of fishes called cichlids in Africa's Lake Malawi is helping researchers at the University of Massachusetts Amherst to refine our understanding of how evolution works.