Letters to the Editor
- Earth
Bringing mammoths back, life on early Earth and more reader feedback
Readers debate the pros and cons of reviving extinct species, discuss the odd light-processing machinery of the eye and more.
- Life
Puzzling cosmic signals, processed food defined and more reader feedback
Readers sort out a definition for processed food, discuss the benefits of tinkering with human DNA and more.
- Planetary Science
Water’s origin story, science and sci-fi and more reader feedback
Readers discuss how Earth got its water, chat about a hot spot's violent past and more.
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- Paleontology
Suds versus nanoparticles and more reader feedback
Readers discuss the posture of an ancient reptile and why washing machines and nanoparticles don't mix.
- Astronomy
Wandering planets, the smell of rain and more reader feedback
Readers consider how hard it would be to fashion Paleolithic tools, discuss what to call free-floating worlds and more.
- Particle Physics
Particle hunting in space, life in the urban jungle and more reader feedback
Readers discuss wheat's journey to England, share stories about urban wildlife and more.
- Animals
Dealing with droughts, museums going digital and more reader feedback
Readers share their experiences with dry weather in the U.S., discuss how humans mentally sort quantities and more.
- Psychology
Rethinking light’s speed, helping young adults with autism and more reader feedback
Readers discuss the best ways to replicate findings in scientific studies, help teenagers with autism transition to adulthood, and more.
- Computing
Concerns about drones, how to hunt exoplanets and more reader feedback
Readers discuss the potential impacts of human-made fliers and muse about the advantages a poker-playing computer program has over human opponents.
- Earth
Water’s unclear origins, shaky solutions to climate change and more reader feedback
Readers discuss the pitfalls of carbon storage, whether a recent movie got Alan Turing's story right and more.
- Earth
Mineral hunting, mob math and more reader feedback
Readers ask about Earth's most abundant mineral and discuss the notoriously unpredictable behavior of pedestrians.
