CHAIN

Earth’s population could shrink soon

Better opportunities for women mean that the threat of overcrowding the planet may not be as dramatic as people fear. The population may well decline in a few decades.

What makes everyone sick?

The world’s best-known doctor is coming to the Big Challenge to talk about the world’s biggest challenge, and one that thousands of scientists are trying to figure out: what makes us sick? Norway is among the challenge participants.

Who in Europe drinks the most?

For the first time, researchers have found a way to compare how much alcohol Europeans drink. And Britain, Ireland and Portugal top off the list.