Thousands of scientists around the world sign a statement that warns the existence of 1,500 species will be imperiled if President Donald Trump’s wall is erected.

Assessments of species vulnerability provide crucial information for conservation efforts. But the science behind them is still evolving.

Scientists are searching for signatures of mammals within the blood meals of the invertebrates.

See the American Museum of Natural History curator Mark Sidall explain his fascination with leeches, which he and other scientists are using to infer biodiversity in some far-flung places.

The new database includes data from 27,000 samples collected at sites ranging from Alaskan permafrost to the ocean floor.

A sampling of some of the fascinating critters identified by scientists this year

The shotgun approach, typically thought to be the superior method, may substantially underestimate diversity in environments that have not already been classified, researchers find.

Little penguins (Eudyptula minor) live on the southeast coast of Australia, one of the global “hot spots” of marine diversity most severely affected by global warming.

From a new Tyrannosaurus and many other dinosaurs to all of the living species named this year, researchers continue to chip away at the planet’s unknown biodiversity.