A light micrograph image shows a green oblong organism with flagella. Inside it is a circular structure.
| 5 min read
What scientists thought was an endosymbiont in algae turned out to be an organelle.

nitrogen

Matthieu Groussin sits with three other people on stools in front of a low table, on which there are several bowls of food. Another person stands above Groussin spooning something into a bowl.

Q&A: Gathering Diverse Microbiome Samples

Rows of soybean plants with green leaves beneath a partially clouded sky with the rising sun in the background.

As Carbon Dioxide Goes Up, Plants’ Nutrient Content Declines

A mesquite tree in an arid environment

Climate Change May Favor Nitrogen-Fixing Plants

Natural sunbeams underwater through water surface in the Mediterranean sea on a seabed with neptune grass, Catalonia, Roses, Costa Brava, Spain

Marine Plant Partners with Microbes Like Terrestrial Plants Do

Infographic showing how a new bacteria species called <em>Candidatus Celerinatantimonas neptuna</em> lives in seagrass and how it provides the plant with nitrogen

Infographic: Nitrogen-Fixing Bacteria Live Inside Seagrass Roots

Photo of Romaine River in Quebec

Microbial Analysis of River Reveals Considerable Diversity

small striped mammal

Gut Microbes Help Ground Squirrels Endure Hibernation

Cicada nymph on a tree, shedding its exoskeleton

Scientists Go Down the Cicada Hole

a bay in the Antarctic

Nitrogen-Fixing Microbes Found in Antarctic Sea

Baby Born from Egg that Was Matured and Frozen in the Lab

ants symbiotic plants

Image of the Day: Farming Ants

Image of the Day: Symbiotic Algae

New Woes for MIT Media Lab

coral erosion bioerosion maui hawaii nitrogen isotopes wastewater

Image of the Day: Eroded Coral

An Invasive Midge Could Wreak Havoc on Antarctica

Rat Remains Reveal Landscape Changes Wrought by Human Settlement of Polynesia

Image of the Day: Slimy Business

Rat Infestation Takes a Toll on Nearby Coral Reefs

Even in the Bronze Age, Humans Altered Soil Chemistry

Adapting to Elevated CO2

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A red male cardinal and a brownish female sit on a branch in front of a green background.

Sex Determination: It’s in the Genes—Sometimes

A group of large animals, some of which are being studied for cancer resistance genes and proteins, are pictured, including a bison, an elephant, a giraffe, a manatee, a zebra, and a whale.

Peto’s Paradox: How Gigantic Species Evolved to Beat Cancer

Photo of John Calhoun crouches within his rodent utopia-turned-dystopia

Universe 25 Experiment

An artistic rendition of polycystic ovarian syndrome, showing ovarian cysts represented by paper balls.

An Anti-Malarial Drug Could Ameliorate PCOS Symptoms

Multimedia

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Olink® Reveal: Accessible NGS-based proteomics for every lab

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Discover the history, mechanics, and potential of PCR.

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A greyscale image of cells dividing.
March 2025, Issue 1

How Do Embryos Know How Fast to Develop

In mammals, intracellular clocks begin to tick within days of fertilization.

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Discover the history, mechanics, and potential of PCR.

Become a PCR Pro

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3D rendered cross section of influenza viruses, showing surface proteins on the outside and single stranded RNA inside the virus

Genetic Insights Break Infectious Pathogen Barriers

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A photo of sample storage boxes in an ultra-low temperature freezer.

Navigating Cold Storage Solutions

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The Immunology of the Brain

The Immunology of the Brain

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