Letters to the Editor

Archaeology

Feedback

Readers ask questions about a study on sweeteners, how scientists recognize primitive tools and the purpose of a dinosaur's sail.

Microbes

Feedback

Readers shares stories about bacteria, discuss ancient volcanic eruptions and express a fondness for science-inspired art.

Health & Medicine

Feedback

Readers discuss methods to prevent sepsis and whether genes are thrifty, while Tina Saey clears up some confusion regarding Ebola's airborne status.

Animals

Feedback

Readers respond to jellyfish, goalkeeping and off-kilter planets.

Planetary Science

Feedback

Readers discuss sources of stress in everyday life and tell us what they think about NASA's plan to nab an asteroid.

Earth

Feedback

Readers discuss Tibetan genetics, how Saharan dust built the Bahamas and why people don't like being left alone with their thoughts.

Life

Feedback

Readers discuss Dulles' microscapes exhibit, baby birthweights and what should be done about the triclosan problem.

Psychology

Feedback

Readers way in on slacktivism, cockroaches, dinosaur tracks and more.

Science & Society

Feedback

Readers discuss mammograms, crops in a warming climate and the impacts of a recession on developing personalities.

Neuroscience

Feedback

Readers weigh in on marijuana legalization, twisted twists, high-kicking frogs and more.

Astronomy

Feedback

Readers debate about what happens when an astronaut falls into a black hole, compare note-taking techniques, speculate on bat longevity and more.

Animals

Feedback

Readers discuss mammal milk, ancient human genetics and hand washing techniques.