In fact, their poop piles are so dense that they show up on satellite images. And the guano stains aren’t just in the spots ...

One of Egypt’s most iconic reminders of the Old Kingdom is the Great Sphinx, which was carved right out of the Giza Plateau’s limestone bedrock, a collection of ancient seabed sediments that ...

Nineteen-year-old U.S. Army Pvt. David Lewis set out from Fort Dix on a 50-mile hike with his unit on Feb. 5, 1976. On that bitter cold day, he collapsed and died. Autopsy specimens unexpectedly ...

There’s a bit of a mystery surrounding obesity. Even though it’s a risk factor for a whole host of health problems, it also seems to offer some mortality benefits. For example, obese individuals ...

Human vision is imperfect. Our eyes do not always represent the world exactly as it is. We have blind spots. We see after-images. We are tricked by optical illusions. But some of these imperfections ...

Just like us, our cells can get old. But while these senescent cells stop dividing, they linger on, which is one reason they’re sometimes called “zombie cells.” Zombie cells aren’t functionally inert, ...

City pigeons have been around since Neanderthals roamed Europe. They served as a valuable food source back then, whereas now they’re decried as a messy nuisance. In fact, some cities have imposed ...

More than 5,000 years ago, a royal woman called Meretneith (also written as Merneith), lived in ancient Egypt. She was possibly the daughter of Djer, the third king of the First Dynasty, a period when ...

In the last few years, there’s been a lot of interest in calorie-restricted diets for weight loss. These can vary significantly, from intermittent fasting (where you restrict eating to a certain ...

Is there life elsewhere, or is Earth unique in the universe? This is one of humanity’s great unanswered questions. One way to approach this mystery is to investigate how life began here on Earth. Our ...