Countdowns

Venom evolved hundreds of millions of years ago, creating a chemical arms race between predatory and prey. Here are some of the most venomous animals living on Earth.

These scientists may be lesser known than Einstein and Newton, but they made giant contributions to science, including astronomy, physics, chemistry and medicine.

From Alan Turing's seminal paper to the advent of ChatGPT, here are 12 pivotal moments in the history of artificial intelligence.

Many deadly infections are transmitted via water, including cholera, typhoid and brain-eating amoebas.

Here's the science behind 20 animal tongues.

From honeybees to elephants, here are six animals with female bosses.

From cave-dwelling creatures to weird-looking animals this countdown covers animals with the wittiest names.

The definition of a species is surprisingly unsettled, and the classifications of some of the best-known animals have come under scrutiny.

Shoes can give us an interesting insight into what people used to wear. Here are a dozen of the most extraordinary finds from the archaeological record.

What is the most dangerous asteroid, how probable is an impact, and how much destructive power would a collision with Earth have? Here are 5 big space rocks that NASA is watching closely.