Amid all the working parts of the human body, the respiratory system administers some of the most important functions that keep us alive. This ensemble of organs, which contains the mouth, nose, throat, and lungs, lets us breathe and talk, manages our body temperature, brings oxygen to other organs, and removes waste carbon dioxide. A plethora of diseases can target the respiratory system, disrupting our health in ways that limit those essential functions. Be on the watch for these respiratory ...read more

When a 6-mile-wide asteroid struck Earth at the end of the Cretaceous period some 66 million years ago, it wiped out the majority of living organisms. Many victims were instantly fried by fires or drowned in tsunamis. The rest, meanwhile, succumbed to hostile conditions and the gradual collapse of entire ecosystems. In the end, about three-quarters of all species were swept into oblivion.Yet many also survived and, eventually, repopulated the planet. Every living thing today is descended from th ...read more

In 2024, we commemorate a milestone in the field of paleontology: the 200th anniversary of the discovery of the Megalosaurus. This landmark event marked the beginning of an era of wonder and exploration into the age of dinosaurs. It was a turning point in our understanding of the natural world, revealing the existence of creatures beyond our wildest imagination. The discovery of the Megalosaurus not only introduced us to these prehistoric giants but also paved the way for numerous subsequent di ...read more

You may notice more aches and pains in your joints as you age. Maybe it’s harder than it used to be to recover from a hard workout. Maybe you’ve noticed some cracking or clicking in your joints or tenderness in your hands and wrists. As we grow older, the wear and tear on our joints can start to take its toll on the body. While it’s common, it can be a painful sign of aging.What Is Arthritis?(Credit: Gorodenkoff/Shutterstock)While there are many forms of arthritis, generally speaking, it� ...read more

Spring, summer, fall and winter – the seasons on Earth change every few months, around the same time every year. It’s easy to take this cycle for granted here on Earth, but not every planet has a regular change in seasons. So why does Earth have regular seasons when other planets don’t?I’m an astrophysicist who studies the movement of planets and the causes of seasons. Throughout my research, I’ve found that Earth’s regular pattern of seasons is unique. The rotational axis that Ear ...read more

Within a limestone cave system in Richards Spur, Oklahoma, paleontologists uncovered several detailed casts of the skin of an ancient animal. The skin resembles a crocodile hide's pattern and texture, with its detail so well-preserved that individual scales pop along the various casts. The skin may belong to one animal or several different species.They are the oldest example of an outer layer of skin for animals found in terrestrial areas, like reptiles, birds, and mammals. A cast of this skin t ...read more

A head of lettuce sealed in plastic. A chicken tender from the hot bar at the local grocery. A bowl of cereal. An oyster served on a bed of ice at a fancy seafood bar. Which of these foods can give you food poisoning?Most people might guess the oyster, but the answer is that any of these foods — even the cooked and packaged ones — can carry foodborne illness.Food contamination can lead to illnesses that are uncomfortable or painful. For the very young, elderly, or people with compromised he ...read more

Taking your dog on a walk or tossing around your cat’s favorite toy may seem like a uniquely modern activity. But humans have lived alongside animals for a long time — and have loved them for almost as long. In fact, it was as many as 40,000 years ago that the first animals began to be tamed and domesticated through their interactions with our ancient ancestors, transforming from wild beasts into beloved friends and, in some instances, family.But a domesticated animal and an adored pet aren� ...read more

A new look at the skull of a tiny extinct mammal has revealed to researchers that it did not belong to the primate order as previously thought, reversing a decades-long notion about the identity of this elusive mammalian family, known as “picrodontids.” Mouse-sized picrodontids, living several million years after the extinction of dinosaurs, were placental mammals that likely lived on a diet of fruit, nectar, and pollen. Until now, they were envisioned as primates because of their teeth, wh ...read more

If the buzz surrounding a medication could elevate it to celebrity status, then Zepbound is reaching Taylor Swift rank.Zepbound is the newest addition to the weight loss drug arena. In November 2023, it joined the list of obesity-fighting drugs – administered as an injection – to be approved by the U.S. Food and Drug Administration.The key to Zepbound’s weight loss potential is its active ingredient, tirzepatide. This is the same active ingredient found in the drug Mounjaro, which is ...read more