Jordana Cepelewicz
Origin-of-Life Study Points to Chemical Chimeras, Not RNA
Origin-of-life researchers have usually studied the potential of pure starting materials, but messy chemical composites may kick-start life more effectively.
Immune Cells Measure Time to Identify Foreign Proteins
T-cells identify what belongs in the body by timing how long they can bind to it.
Goals and Rewards Redraw the Brain’s Map of the World
Two new studies show that the brain’s navigation system changes how it represents physical space to reflect personal experience.
Smarter Parts Make Collective Systems Too Stubborn
As researchers delve deeper into the behavior of decentralized collective systems, they’re beginning to question some of their initial assumptions.
Artificial Intelligence Finds Ancient ‘Ghosts’ in Modern DNA
With the help of deep learning techniques, paleoanthropologists find evidence of long-lost branches on the human family tree.
Why Evolution Reversed These Insects’ Sex Organs
Among these cave insects, the females evolved to have penises—twice. The reasons challenge common assumptions about sex.
What Defines a Stem Cell? Scientists Rethink the Answer
As it becomes clear that the body’s cells have more diverse regenerative capabilities than expected, experts have had to reconsider their approach to stem cell research.
“Traffic Jams” of Cells Help to Sculpt Embryos
By measuring mechanical forces inside an embryo for the first time, researchers have shown how a physical “jamming” mechanism assists development.
Why Nature Prefers Couples, Even for Yeast
Some species have the equivalent of many more than two sexes, but most do not. A new model suggests the reason depends on how often they mate.
Chronological Clues to Life’s Early History Lurk in Gene Transfers
To date the branches on the evolutionary tree of life, researchers are looking at horizontal gene transfers among ancient microorganisms, which once seemed only to muddle the record.
Complex Animals Led to More Oxygen, Says Maverick Theory
that new animal behaviors raised oxygen levels and remade the environment.
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 parasites.











