References

Discover interesting facts about how dolphins sleep, if they're dangerous, and what they eat.

Discover interesting facts about whales, how big they can get, and how they track down their prey.

Everything you need to know about photoplethysmography (PPG), the technology behind heart rate measurements in fitness watches and smart rings.

Discover interesting facts about when dinosaurs lived, why they died and how big they got

From sets celebrating architecture and famous art to clever designs, these are the best Lego sets for adults.

References Rowing machines and treadmills do not challenge your cardiovascular system in the same way, so what is the science behind it?

We're sharing our best tips on how to photograph the moon and with the total lunar eclipse on March 13-14 — discover the right gear, settings and composition techniques to make the most of the event.

Discover interesting facts about how Earth formed, what it's made of and more.

Explore the wonders of the night sky with our guide to the best celestial sights you can observe with binoculars between February and April 2025.

Discover interesting facts about snakes, from how they hunt and eat, to why they don't have legs.