References

We pit air purifiers against dehumidifiers to get to the bottom of what each appliance really does.

REFERENCE We take a look at air purifiers vs humidifiers to get a sense of the differences.

Blame plate tectonics for Earth’s mountains, earthquakes, volcanoes, and why its continents fit together like pieces of a giant jigsaw puzzle.

Almost everything you know about the famous Fibonacci sequence is wrong.

If you're looking to make the most of the dark winter nights, Black Friday and Cyber Monday are fantastic times to save money on your next telescope ahead of Christmas.

The Nile crocodile is one of the largest predators in Africa.

An almond-shaped structure deep in the brain controls people's feelings of hunger and fullness in an attempt to keep them at a constant body weight. In obesity, its signaling can be disrupted.

Reference We take a closer look to see if using air purifiers helps with asthma.

REFERENCE Air purifiers can improve air quality, but do these devices help relieve allergies?

REFERENCE We pit air purifiers against ionizers to get to the bottom of what each appliance really does.

Reference Air purifiers are intended to remove pollutants from the air, but how well do they really work?

REFERENCE Can air purifiers help with dust and dust mite allergies?

The use of "anno domini" and "before Christ" to mark time began in the early days of Christianity, when clerics needed to know when Easter would fall.

BUYING GUIDE The best Fitbit wearables available to buy: Tried and tested to provide you with options from simple fitness trackers to feature-packed smartwatches.

New scientific techniques are helping us reconstruct people from the past in uncanny detail.

The Nobel Prize in Chemistry includes famous winners such as Marie Curie and Otto Hahn.

An artist's illustration of an artificial neural network.

Here's a look at past winners of the Nobel Prize in Physiology or Medicine.

Although quantum computing is a nascent field, there are plenty of key moments that defined it over the last few decades as scientists strive to create machines that can solve impossible problems.

At the core of a quantum computer is the quantum processor, but these technologies are vastly different from the CPUs found in conventional computers.