"Guam's most endangered tree species reveals universal biological concept." ScienceDaily. www.sciencedaily.com / releases / 2020 / 11 / 201130101231.htm (accessed February 15, 2026).

A new photo of a long-forgotten flower showed up online. Identifying it means getting into the tricky question of how a species is defined. A population of lemon beebalm (Monarda citriodora) flowering ...

There may be twice as many vertebrates on the planet as previous estimates claimed, according to a new study published in the journal Proceedings of the Royal Society B: Biological Sciences. That's ...

ISBN 0-309-09536-0 (hardcover)—ISBN 0-309-54760-1 (pdf) 1. Species. 2. Biology—Classification. I. Mayr, Ernst, 1904-2005. II. Hey, Jody. III. Fitch, Walter M ...

The idea of a species is fundamental to the way that many people understand the structure of life on Earth. But ask 10 specialists how they define the concept and you might get 10 answers. In this ...