Letters to the Editor

Readers discuss the 1921 Tulsa race massacre, zombie fires and more

Readers weigh in on the Brazil nut effect, clock entropy and more

Readers react to birds colliding with wind turbines, mysterious muons and more

Readers weigh in on the ‘USS Jellyfish,’ the new age of videocalling and more

Readers weigh in on microbes traveling by smoke, ‘Oumuamua and more

Readers ask about black hole collisions, catnip and more

Readers react to million-year-old mammoths, parasitic plants and more

We revisit last year’s COVID-19 questions, readers weigh in on tuataras and more

Readers weigh in on brain technology, black holes and more

Readers react to cosmic smashups and tricky spacecraft landings

Readers react to the history of plate tectonics, pandas rolling in poop and more

Readers ask about shrinking toads, defining distance in an expanding universe and more