Readers weigh in on brain technology, black holes and more

Mind readers

Scientists are grappling with the ethical implications of new technology that aims to listen to and perhaps change brain activity, Laura Sanders reported in “Inside your head” (SN: 2/13/21, p. 24).

“Interesting and provocative read,” reader Andrew Nelson wrote. “Once the intricacies of our thoughts become recordable (or worse, reproducible), they will be misused.”