Related topics: species · climate change

Evolution in the gut

Evolution and dietary habits interact and determine the composition of bacteria in the digestive tract. Many microorganisms in the intestine seem to have developed in sync with their host animals over millions of years.

Reading the dark heart of chromosomes

Although the genomes of thousands of plant and animal species have been sequenced, for most of these genomes a significant portion is missing—the highly repetitive DNA. In the midst of these mysterious genome compartments ...

Indigenous peoples, 'guardians of Nature', under siege

From Amazon rainforests to the Arctic Circle, indigenous peoples are leveraging ancestral knowhow to protect habitats that have sustained them for hundreds and even thousands of years, according to a landmark UN assessment ...

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Species

In biology, a species is:

There are many definitions of what kind of unit a species is (or should be). A common definition is that of a group of organisms capable of interbreeding and producing fertile offspring, and separated from other such groups with which interbreeding does not (normally) happen. Other definitions may focus on similarity of DNA or morphology. Some species are further subdivided into subspecies, and here also there is no close agreement on the criteria to be used.

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