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tag carbon dating microbiology evolution developmental biology

In Canada, Signs of Life Nearly 4 Billion Years Old
Ashley P. Taylor | Sep 28, 2017 | 2 min read
Embedded within 3.95-billion-year-old rock, scientists have found graphite with a carbon signature that indicates biological activity.
Microscopic image of a live amoeba.
Illuminating Specimens Through Live Cell Imaging
Charlene Lancaster, PhD | Mar 14, 2024 | 8 min read
Live cell imaging is a powerful microscopy technique employed by scientists to monitor molecular processes and cellular behavior in real time.
An illustration of green bacteria floating above neutral-colored intestinal villi
The Inside Guide: The Gut Microbiome’s Role in Host Evolution
Catherine Offord | Jul 1, 2021 | 10+ min read
Bacteria that live in the digestive tracts of animals may influence the adaptive trajectories of their hosts.
Microbial Fossils Found in 3.4-Billion-Year-Old Subseafloor Rock
Ruth Williams | Jul 14, 2021 | 3 min read
The material, now part of an African mountain range, bolsters the idea that hydrothermal veins supported early forms of life.
Calcite crystals covered in small grains of pyrite, with pincers
Signs of Ancient Microbial Life Abundant in Earth’s Crust: Study
Catherine Offord | Jun 3, 2021 | 5 min read
Researchers report chemical and molecular signatures of microbial activity from millions of years ago in mineral samples from abandoned mines in Sweden and nearby countries.
Short Shrift to Evolution?
Barry Palevitz and Ricki Lewis | Feb 1, 1999 | 7 min read
Editor's Note: In this essay, the authors--both scientists and writers--discuss recent news stories on evolution and express their opinions on how the stories were handled by the mainstream press. Evolution took center stage at the National Association of Biology Teachers (NABT) annual meeting in Reno, Nev., Nov. 3-8, 1998. If the teachers needed a theme, evolution was a logical choice--after all, it underlies and unifies contemporary biology. But NABT had other fish to fry. Despite a spate of c
Revolutionary Repurposing
Neil Shubin | Jun 1, 2020 | 3 min read
Evolution needn’t make improbable leaps to facilitate transitions into uncharted biological territory. Adapting new uses for existing structures works just fine.
The Role of Mom’s Microbes During Pregnancy
Carolyn A. Thomson and Kathy D. McCoy | Aug 1, 2021 | 10+ min read
Bacteria in the gut influence the production of antibodies and themselves secrete metabolites. In a pregnant woman, these compounds may influence immune development of her fetus.
Life Thrives Within the Earth’s Crust
Catherine Offord | Oct 1, 2018 | 10+ min read
From journeys into mines to explorations of volcanoes on the ocean floor, deep voyages reveal the richness of the planet’s deep biosphere.
Search for Life on the Red Planet
Diana Kwon | Dec 1, 2017 | 10+ min read
Growing evidence points to a once-habitable world—and recent findings suggest that life could exist on Mars today.

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