Readers discuss big bacteria, gravitational radar and more

Biggest bacteria?

A newfound species of bacteria, Thiomargarita magnifica, averages 1 centimeter long and can be seen by the naked eye, making it the largest bacteria yet discovered, Erin Garcia de Jesús reported in “Newfound bacteria make a big splash” (SN: 7/16/22 & 7/30/22, p.