What's up in

evolution

evolution

Did Neurons Evolve Twice?

The comb jelly, a primitive marine creature, is forcing scientists to rethink how animals got their start.

Biology

Killer Virus Is Invading Koala DNA

An infection sweeping through Australia’s struggling koala population provides an unprecedented opportunity to explore how retroviruses insert themselves into the genome.

evolution

Game Theory Calls Cooperation Into Question

A new solution to the prisoner’s dilemma, a classic game theory scenario, has created new puzzles in evolutionary biology.

Biology

New Twist Found in the Story of Life’s Start

All life on Earth is made of molecules that twist in the same direction. New research reveals that this may not always have been so.

evolution

Ancient Survivors Could Redefine Sex

Microscopic creatures called bdelloid rotifers have thrived without mating for millions of years. How they did it could reveal why sex is so essential for almost everyone else.

biology

Elusive Form of Evolution Seen in Spiders

A study of diverse colonies of spiders supports a controversial idea in evolution — that natural selection can act on communities as well as on individuals.

Ships Docking
ecology

Lizard Stowaways Revise Principle of Ecology

The movement of lizards around the Caribbean is forcing researchers to account for human activity in even their most basic ecological models.

Yeast
evolution

Evolution’s Random Paths Lead to One Place

A massive statistical study suggests that even though genetic changes happen at random, the final evolutionary outcome — fitness — is predictable.

Melpomene
genetics

As Animals Mingle, a Baffling Genetic Barrier

Despite swapping DNA through interbreeding, butterflies and other animals can maintain distinct species.