Letters to the Editor

Genetics

Readers question the biology of alcoholism and more

Alcoholism-linked genes, making better corneas and more in reader feedback.

Physics

A metallic odyssey, what’s causing sunspots and more reader feedback

Metallic hydrogen, sunspot formation, salty desalination leftovers and more in reader feedback.

Cosmology

A cosmic quandary, risks of hatching early and more reader feedback

The cosmos, tadpole escape artists, vehicle collisions and more in reader feedback.

Health & Medicine

Readers contemplate aging research

Aging research, dino guts and Earth's quasisatellite in reader feedback.

Tech

Readers respond to terrorism’s roots

Readers respond to the July 9, 2016, issue of Science News with questions on terrorism, dog evolution and more.

Earth

General relativity has readers feeling upside down

Readers respond to the June 25, 2016, issue of Science News with questions on Earth's age, moaning whales, plate tectonics and more.

Animals

Readers ponder animal flight

Readers respond to the June 11, 2016, issue of Science News with questions on cormorants, butterflies, virus-sensing genes and more.

Animals

Readers mesmerized by ‘Strange visions’

Animal vision, ice-making microbes, brain maps and more reader feedback.

Science & Society

Readers debate gun violence research and more

Gun violence research, plaque-busting sugar and more in reader feedback.

Space

Readers weigh in on ET and the meaning of life

Reader feedback from the June 25, 2016, issue of Science News

Climate

Readers share climate change concerns

Readers respond to the April 16, 2016, issue of Science News with thoughts on climate change, prairie dogs and more.

Health & Medicine

Zika, psychobiotics and more in reader feedback

Readers respond to the April 2, 2016, issue of Science News with thoughts on Zika virus, planetary science, microbes in mental health and more.