Letters to the Editor

Readers ask about Microraptors, an X-ray map of the sky and more

Readers ask about neutrinos in the sun’s core, megaflashes and mussels

Readers ask about Mars dust storms, Fermi bubbles and more

A reader asks about coronavirus mutations

Readers ask about antibody tests, chimeras and public health and privacy

Readers ask about exoplanet heating sources, combating climate change and COVID-19

Readers ask about the size of the Milky Way, ancient rainforests and COVID-19

Readers ask about dust in space, playgrounds, and COVID-19

Readers ask about satellite traffic jams and coronavirus

Readers ask about bat viruses and coronavirus

Readers ask about coronavirus, and weigh in on climate change coverage

Readers weigh in on coronavirus, cats and more