immune system, evolution
How Plants Evolved Different Ways to Make Caffeine
Ruth Williams | Sep 20, 2016
Caffeine-producing plants use three different biochemical pathways and two different enzyme families to make the same molecule.
Stingrays Chew Too
Ben Andrew Henry | Sep 15, 2016
Researchers observe stingrays moving their jaws to grind up prey, a behavior thought to be restricted to mammals.
Week in Review: September 5–9
Jef Akst | Sep 8, 2016
Environmental magnetite in the human brain; prion structure takes shape; watching E. coli evolve in real time; learning from others’ behavior 
Giant Petri Dish Displays Evolution in Space and Time
Jenny Rood | Sep 8, 2016
As E. coli bacteria spread over increasingly concentrated antibiotics, researchers discover novel evolutionary pathways that confer resistance.
Promoting Protein Partnerships
Ruth Williams | Sep 1, 2016
Scientists generate new protein-protein interactions at an impressive PACE.
What Sensory Receptors Do Outside of Sense Organs
Sandeep Ravindran | Sep 1, 2016
Odor, taste, and light receptors are present in many different parts of the body, and they have surprisingly diverse functions.
Protein or Perish
Ruth Williams | Aug 31, 2016
A bacteriophage must evolve certain variants of a protein or die.
Extinct River Dolphin Species Discovered
Alison F. Takemura | Aug 16, 2016
Overlooked for half a century, a skull in the Smithsonian collection points to a dolphin species that lived 25 million years ago, according to a study.
Using RNA to Amplify RNA
Abby Olena | Aug 15, 2016
Researchers apply in vitro evolution to generate an RNA enzyme capable of copying and amplifying RNA.
On Becoming Human
Mary Beth Aberlin | Aug 1, 2016
Some thoughts on going to the Galápagos
Newly Discovered Emergency Responders to Liver Damage
Ashley P. Taylor | Aug 1, 2016
Immune cells called macrophages from the peritoneal cavity of mice migrate to injured livers and aid in repair.
Pesticide Resistance in a Plant Organelle Drives Down Whole-Genome Diversity
Catherine Offord | Aug 1, 2016
A chloroplast mutation has dramatically affected the genomes of railside populations of Arabidopsis thaliana.
Opinion: Our Inner Caveman
João Pedro de Magalhães | Aug 1, 2016
The modern human brain evolved in social and environmental settings very unlike today’s. Despite our cultural and technological progress, tribal instincts remain.
Opinion: Monogamy and Cooperation Are Connected Through Multiple Links
David F. Westneat, Jacqueline R. Dillard | Aug 1, 2016
Why does cooperation evolve most often in monogamous animals?
Humans Never Stopped Evolving
John Hawks | Aug 1, 2016
The emergence of blood abnormalities, an adult ability to digest milk, and changes in our physical appearance point to the continued evolution of the human race.
Decoding Human Accelerated Regions
Katherine S. Pollard | Aug 1, 2016
Do the portions of our genomes that set us apart from other animals hold the secret to human evolution?
Contributors
The Scientist Staff | Aug 1, 2016
Meet some of the people featured in the August 2016 issue of The Scientist.
Understanding Human Accelerated Regions
Katherine S. Pollard | Jul 31, 2016
Fast-evolving regions of the human genome differentiate our species from all other mammals.
Nailing Down HAR Function
Katherine S. Pollard | Jul 31, 2016
A remaining challenge in the study of human accelerated regions (HARs) is establishing their specific functions during development and other biological processes.
Man and Bird Chat While Honey Hunting
Bob Grant | Jul 25, 2016
A study suggests that humans and avians in sub-Saharan Africa communicate to find and mutually benefit from the sweet booty.