Twice a day the River Thames recedes, revealing a muddy shoreline. Hobbyists known as mudlarks stroll the surface searching for objects that have found their way into the river over the centuries, everything from ancient Roman jewelry to modern...
Zoe from Kingston, New York, wonders: what is the plural of octopus? More than one of these animals can be referred to as octopi or octopuses. Octopus comes from Greek words that mean “eight feet,” so strictly speaking, if you wanted to...