O segredo do peixe-boi para viver só de plantas: a história em inglês, no seu nível

A hidden world in the manatee's gut: Brazilian scientists map thousands of new microbes

How does Brazil's largest freshwater mammal keep up a body of up to 450 kilograms on a diet made up entirely of plants? The answer lies in its gut. A study led by CNPEM, in Campinas, and published in Nature Microbiology on November 2, 2026, maps the microbes that do the heavy lifting.

Unlike cattle, which ferment food mainly in the rumen, before the stomach, manatees ferment it afterwards, so gut microbes are central to breaking down fibre. Mario Murakami's group, which had already studied capybaras, turned to 47 manatees: 36 Amazonian manatees at INPA, in Manaus, and 11 marine manatees in rehabilitation with Aquasis, in Ceará.

Fieldwork had its moments. A released marine manatee kept returning near the rehabilitation enclosure, and when it defecated, Murakami says, he did not think twice and jumped into the water to retrieve the sample.

The haul was remarkable: more than 6,000 genomes, over half from species not yet described. The microbes digest cellulose with an efficiency of around 80% to 86%, and one newly described bacterium relies on an enzyme never before seen in nature to break down a sugar most microbes cannot use.

Murakami expects the data to keep researchers busy for a decade and sees Brazilian biodiversity as a repository of solutions to global problems.

There is a lesson here for language learners, too. Discoveries often come from looking closely at what others overlook, and from being willing to get your feet wet. Dive into real conversations, even messy ones, and you will find more than any textbook promised.