Latest References
Ancient Egypt: Facts about the ancient civilization known for its pyramids, mummies and pharaohs
Discover interesting facts about ancient Egypt's pyramids, mummies and pharaohs.
Bears: Facts about the furry omnivores that live in many parts of the world
Discover interesting facts about the different types of bears and learn why not all bears hibernate.
Cats: Facts about our feline friends
Discover interesting facts about cat intelligence, how they see the world, and why we keep them around.
How to photograph a meteor shower
Everything you need to know to photograph a meteor shower, from choosing the right time to camera settings, and some advanced techniques for creating meteor images you can be proud of.
Neanderthals: Who were they and what did our extinct human relatives look like?
Discover interesting facts about who Neanderthals were, whether they mated with modern humans and when they died out.
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.
