A microscope image of Legionellales bacteria infecting a protozoan
Ancestral Bacteria May Have Invaded Early Eukaryotic Cells
The discovery that a group of cell-infecting bacteria lived roughly 2 billion years ago stirs a longstanding controversy around which came first: phagocytosis or mitochondria.
Ancestral Bacteria May Have Invaded Early Eukaryotic Cells
Ancestral Bacteria May Have Invaded Early Eukaryotic Cells

The discovery that a group of cell-infecting bacteria lived roughly 2 billion years ago stirs a longstanding controversy around which came first: phagocytosis or mitochondria.

The discovery that a group of cell-infecting bacteria lived roughly 2 billion years ago stirs a longstanding controversy around which came first: phagocytosis or mitochondria.

debate
Woman waiting in line at the airport, carrying a bag and standing next to two other suitcases. She is wearing a N95 face mask.
SARS-CoV-2 in the Air: What’s Known and What Isn’t
Alejandra Manjarrez | Feb 18, 2022
Evidence suggests that COVID-19 is primarily an airborne disease. Yet the details of how transmission occurs are still debated and frequently misunderstood.
Caudipteryx Dinosaur Flock stock photo
Paleontologists Find Possible Dinosaur DNA
Chloe Tenn | Oct 26, 2021
A report of preserved fragments of nuclei and chromatin in a fossilized femur of a 125-million-year-old Caudipteryx dinosaur elicits skepticism.
Image of the Day: Scarred Hearts
Ashley Yeager | Dec 4, 2018
Maps of diving cells before and after heart attacks in mice offer additional evidence against the existence of cardiac stem cells.
Researchers Succeed in Keeping Disembodied Pig Brains Alive
Catherine Offord | May 1, 2018
The organs showed neural activity for up to 36 hours, adding fuel to discussions about the ethics of future neuroscientific research.
Professor Sues PNAS Over Paper Criticisms
Kerry Grens | Nov 2, 2017
Stanford’s Mark Jacobson is asking for $10 million in damages after the journal published a critique of his work on renewable energy.
Irisin Skepticism Goes Way Back
Kerry Grens | Mar 18, 2015
Post-publication peer reviewers had questioned data about the supposed fat-browning enzyme from the get-go.
Glowing Plants Firm Gets Venture Backing
Bob Grant | Aug 13, 2014
After raising more than $450,000 on Kickstarter, a startup making glow-in-the-dark houseplants attracts seed funding from a Silicon Valley venture capital firm.
skulls creationism
Opinion: Confronting Creationism
Ann Reid and Glenn Branch | Feb 7, 2014
Five reasons why scientists should stay out of debates over evolution.
Speaking of Science
The Scientist Staff | Aug 1, 2013
August 2013's selection of notable quotes
Debate over Glowing Plants Grows
Bob Grant | Jun 5, 2013
A Kickstarter project that promises donors Arabidopsis seeds transfected with firefly genes is causing a stir.
Survival of the Fittest (to print)
Mary Beth Aberlin | Aug 1, 2012
Science publishing is locked in an evolutionary arms race as it edges further into the digital age.