Society used to think of sexuality as just having two options: men who like women, and women who like men. But now it's recognized that sexuality is far more complex, defined by what individuals feel they are and the different people to whom they are attracted. The good news for students today: There is a place for all of these people in science and engineering.

In March, Cyclone Idai struck Mozambique, causing widespread flooding. It also sparked an outbreak of cholera.

Handshakes can really leave an impression. You might leave enough of your DNA behind to end up on the next object your handshaking partner touches — without ever touching it yourself.

Most people think that vaccines only help those who get that shot in their arm. In fact, vaccines also limit the spread of disease to people who, for medical reasons, cannot be vaccinated.