physiology
Heart’s Backup Pacemaker Mechanisms Identified
Heart’s Backup Pacemaker Mechanisms Identified
Diana Kwon | Jul 28, 2017
The sinoatrial node is home to multiple pacemakers that keep the heart beating if the main one falters.
Anti-Preeclampsia Hormone Discovered
Anti-Preeclampsia Hormone Discovered
Ruth Williams | Jun 29, 2017
A small, placenta-produced peptide fixes the pregnancy-related condition in mice. 
Mammalian Jaws Evolved to Chew Sideways
Mammalian Jaws Evolved to Chew Sideways
Catherine Offord | Jun 1, 2017
Parallel evolution in jaws and teeth helped early mammals diversify their diets.
Bone Marrow Isn’t the Only Source of Platelets
Bone Marrow Isn’t the Only Source of Platelets
Ashley P. Taylor | Jun 1, 2017
Scientists have estimated that about half of murine platelet production occurs in the lungs.
Running on Empty
Running on Empty
Bob Grant | Jun 1, 2017
Regularly taking breaks from eating—for hours or days—can trigger changes both expected, such as in metabolic dynamics and inflammation, and surprising, as in immune system function and cancer progression.
Plastic Pollutants Pervade Water and Land
Plastic Pollutants Pervade Water and Land
Ee Ling Ng | Jun 1, 2017
Contamination of marine and terrestrial ecosystems by microplastics is putting individual organisms at risk.
Infographic: Plastics’ Effects
Infographic: Plastics’ Effects
Ee Ling Ng | May 31, 2017
Lab studies suggest that plastic pollutants in the environment could have detrimental effects on animals’ physiology.
Tissue-Clearing Technique Works on Bone
Tissue-Clearing Technique Works on Bone
Kerry Grens | Apr 26, 2017
CLARITY made mouse bones transparent while preserving fluorescent labels so researchers could visualize tagged osteoprogenitors.
Sweet Trick, Hawkmoths
Sweet Trick, Hawkmoths
Bob Grant | Apr 17, 2017
The fast-flying insects convert sugars from nectar into antioxidants, which can help heal the oxidative damage suffered by their hard-working muscles.
Exercise-Induced Muscle Factor Promotes Memory
Exercise-Induced Muscle Factor Promotes Memory
Ruth Williams | Jun 23, 2016
Running releases an enzyme that is associated with memory function in mice and humans.