Biology

Lots of population numbers are pretty made-up. In many countries, there just isn’t really the infrastructure to do a good census. In Papua New Guinea, they’re not sure if the number of people is 9 million or 17 million. Similar things are true in other countries like Nigeria, which may have tens of millions more or fewer people than is standardly reported. In lots of countries, the way they get their official census numbers…

From a physicist’s perspective, no complex system is weirder or more challenging than life. For one thing, the organization of living matter defies physicists’ usual expectations about the universe. Your body is made of matter, just like everything else. But the atoms you’re built from today won’t be the atoms you’re built from in a year. That means you and every other living thing aren’t an inert object, like a rock, but a…

Knapp and her colleagues have found in a new study, appears to be the case for the world’s third-most important staple crop: The 8-to-9-million-year-old lineage that begat the modern potato may have arisen from a chance encounter between a flowering plant from a group called Etuberosum and … an ancient tomato. Tomatoes, in other words, can now justifiably be described as the mother of potatoes. The plant experts I interviewed…