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image: How Poison Frogs Avoid Poisoning Themselves

How Poison Frogs Avoid Poisoning Themselves

By | September 21, 2017

Amphibians resist their own chemical defenses with amino acid modifications in the sequence for a target receptor.

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A study of a simple marine animal suggests that the common ancestor of cnidarians and bilaterians may have had three germ layers instead of two.

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image: Fingerprints of Ongoing Human Evolution Found

Fingerprints of Ongoing Human Evolution Found

By | September 5, 2017

Genetic variants in Alzheimer’s- and smoking-related genes appear to be under selection pressure, according to a study comparing the genomes of old and young participants.

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image: Global Patterns of Human Epigenetic Variation

Global Patterns of Human Epigenetic Variation

By | August 28, 2017

A study of five far-flung human populations gives clues to adaptations to environmental pressures.

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The genomes of two species of water bears reveal clues about how they persist in extreme conditions, yet don’t resolve the animals’ debated evolutionary story.

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image: Stem Cells in the Hypothalamus Slow Aging in Mice

Stem Cells in the Hypothalamus Slow Aging in Mice

By | July 26, 2017

Once implanted into animals’ brains, neural stem cells that secrete microRNA-containing vesicles seem to contribute to an anti-aging effect.

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image: Caterpillars Turn to Cannibalism: Study

Caterpillars Turn to Cannibalism: Study

By | July 10, 2017

Herbivores may take to omnivory and eat conspecifics when the plants they feed on produce unsavory protective chemicals.

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A study suggests that “chief” cells in the stomach act as reserve stem cells that are activated by tissue damage and may be the long-sought source of gastric cancer.

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image: Mammals May Have a 12-Hour Clock

Mammals May Have a 12-Hour Clock

By | June 6, 2017

Data point to peaks in gene expression in the morning and evening that are distinct from day-night circadian cycles.

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image: Researchers Discover Salt-Loving Methanogens

Researchers Discover Salt-Loving Methanogens

By | May 26, 2017

Two previously overlooked archaeal strains fill an evolutionary gap for microbes.

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