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Oxygen and Stem Cells May Have Reshaped Early Complex Animals
An unlikely team offers a controversial hypothesis about what enabled animal life to get more complex during the Cambrian explosion.
New Giant Viruses Further Blur the Definition of Life
A newfound pair of giant viruses have massive genomes and the most complete resources for building proteins ever seen in the viral world. They have refreshed the debate about the origins of these cellular parasites.
Why Don’t Patients Get Sick in Sync? Modelers Find Statistical Clues.
The long, variable times that some diseases incubate after infection defies simple explanation. An idealized model of tumor growth offers a statistical solution.
A Statistical Search for Genomic Truths
The computer scientist Barbara Engelhardt develops machine-learning models and methods to scour human genomes for the elusive causes and mechanisms of disease.
The Simple Algorithm That Ants Use to Build Bridges
Even with no one in charge, army ants work collectively to build bridges out of their bodies. New research reveals the simple rules that lead to such complex group behavior.
How Cells Pack Tangled DNA Into Neat Chromosomes
For the first time, researchers see how proteins grab loops of DNA and bundle them for cell division. The discovery also hints at how the genome folds to regulate gene expression.
Evolution Saves Species From ‘Kill the Winner’ Disasters
Modelers find evidence that a combination of competition, predation and evolution will push ecosystems toward species diversity anywhere in the universe.
With Strategic Zaps to the Brain, Scientists Boost Memory
Stimulating part of the cortex as needed during learning tasks improves later recall. The finding reveals more about the brain's memory network and points toward possible therapies.
In Birds’ Songs, Brains and Genes, He Finds Clues to Speech
The neuroscientist Erich Jarvis found that songbirds' vocal skills and humans' spoken language are both rooted in neural pathways for controlling learned movements.