transmissible animal cancer tumor cells dogs Tasmanian devils

A few cancers can spread from one animal to another

Most cancers cannot pass between individuals. But in a few animals, living cancer cells themselves can move from one animal to another and keep growing. Examples include a transmissible cancer in dogs and a facial cancer in Tasmanian devils.

Russia's income grew, but output per person stayed low

From 1885 to 1913, the Russian Empire’s real national income grew about 3.3% a year, keeping pace with Western industrial growth. But rapid population growth meant output per person remained only about one-third to one-half of Western European levels.

Children learn most new words without anyone formally teaching them

Children acquire vocabulary far faster than adults could teach every word individually. They use context, familiar sentence patterns, gestures and repeated encounters to infer what unfamiliar words mean. Direct instruction helps, but much language learning happens during ordinary conversation and observation. Children are constantly solving small puzzles about meaning.

Like this? There’s a whole feed of it. Replace empty scrolling with things worth knowing.

Download Hence for free

transmissible animal cancer tumor cells dogs Tasmanian devils

A few cancers can spread from one animal to another

Keep exploring