Latest References
Dolphins: Facts about the intelligent marine mammals that use tools to hunt
Discover interesting facts about how dolphins sleep, if they're dangerous, and what they eat.
Whales: Facts about the largest animals on Earth
Discover interesting facts about whales, how big they can get, and how they track down their prey.
How do fitness trackers measure your heart rate?
Everything you need to know about photoplethysmography (PPG), the technology behind heart rate measurements in fitness watches and smart rings.
Dinosaurs: Facts about the reptiles that roamed Earth more than 66 million years ago
Discover interesting facts about when dinosaurs lived, why they died and how big they got
Best Lego sets for adults 2025: Science, nature & engineering sets for curious minds
From sets celebrating architecture and famous art to clever designs, these are the best Lego sets for adults.
How does rowing affect your heart, and is it different to running?
References Rowing machines and treadmills do not challenge your cardiovascular system in the same way, so what is the science behind it?
Vernal equinox 2025: What is an equinox, and when does spring begin?
REFERENCE Equinoxes occur twice a year, with night and day being almost the exact same length all across the world. The next equinox is the March vernal equinox, beginning on March 20, 2025 in North America.
How to photograph the moon: Tips on camera gear, settings and composition
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.
