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Research posts

Duck-billed dinosaur tooth topography

Grinding Teeth of Duck-bill Dinosaurs More Advanced Than Horses'

Research posts

A new scientific study shows that duck-billed dinosaurs pulverized tough and abrasive plants with grinding teeth more complex than those of cows, horses, and other well-known modern grazers. The researchers, which included Mark Norell, the chair of the Museum’s Division of Paleontology, are the first to recover material properties from fossilized teeth.

Tags: Dinosaurs, Our Research, Paleontology

Two Nectar Bats

New Study: Nectar-drinking Traits in Bats Evolved More Than Once

Research posts

Contradictory explanations for the evolution of nectar-drinking in a diverse group of bats have long puzzled scientists, but new research led by the American Museum of Natural History and Stony Brook University provides a clear answer.

The conflicting explanations come from two different types of data. Genetic data suggest that nectar feeding evolved twice in New World leaf-nosed bats whereas earlier analyses of the bats’ anatomy point to a single origin of nectar feeding. These bats are found in Central and South America and, uniquely among bats, eat nectar, fruit, frogs, lizards, and blood.

Tags: Mammals, Our Research

Sea Turtles Solomon Island

A Summer's Work in the Solomon Islands

Research posts

In the Solomon Islands, an archipelago of some 1,000 islands east of Papua New Guinea, the Museum is partnering with indigenous communities to improve biodiversity conservation within ancient customary lands. This summer, Michael Esbach, Pacific Programs manager in the Museum’s Center for Biodiversity and Conservation (CBC), travelled to three of these islands with CBC Pacific Programs Director Christopher Filardi and CBC Director Eleanor Sterling.

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Blind cave fish

Eyeless Australian Cave Fishes' Closest Relatives in Madagascar

Research posts

Researchers from the American Museum of Natural History and Louisiana State University have discovered that two groups of blind cave fishes now separated by about 6,000 miles of open ocean are each other’s closest relatives. These eyeless fishes, one group from Madagascar and the other from Australia, descended from a common ancestor before being separated by continental drift nearly 100 million years ago, the scientists say. Their study, which was published this week in the journal PLOS ONE, also identifies new species that add to existing biological proof for the existence of Gondwana, a prehistoric supercontinent that was part of Pangaea and contained all of today’s southern continents.

The cave fishes, of the genus Typhleotris in Madagascar and Milyeringa in Australia, are small—less than 100 millimeters long—and usually lack pigment, a substance that gives an organism its color and also provides protection from the sun’s ultraviolet radiation. These characteristics, coupled with a lack of eyes and enhanced sensory capabilities, are common in many cave organisms.

Tags: Bioluminescence, Our Research

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