What is global warming? By Stephanie Pappas Global warming is the gradual heating of Earth's surface, oceans and atmosphere.
What is a coronavirus? By Nicoletta Lanese SARS, MERS and the common cold are all types of coronaviruses.
Megalodon: Facts about the long-gone, giant shark By Alina Bradford Megalodon was the largest shark and one of the largest fish on record. It went extinct about 2.6 million years ago.
Why is Jerusalem important? A Q&A with historian and author Simon Sebag Montefiore By All About History Jerusalem is the epicenter of several of the world's major religions, but its importance is much more than just spiritual.
Anemia: Causes, symptoms and treatment By Cari Nierenberg Anemia is a common condition that may be caused by a shortage of iron, abnormal bleeding, infections, cancer or gastrointestinal problems.
What is ocean acidification? By Tim Childers The global increase in carbon dioxide emissions is not only warming our planet at an alarming rate, but it's also making our oceans more acidic.
Psilocybin: The magic ingredient in psychedelic shrooms By Cari Nierenberg Psilocybin, like other psychedelics, is illegal, but controlled doses may have therapeutic effects.
What is toxoplasmosis? By Nicoletta Lanese This parasitic infection hijacks rodent brains and infects people through dirty cat litter. There's a good chance you have it.
Neuroblastoma: Causes, symptoms & treatment By Cari Nierenberg Neuroblastoma is a rare form of childhood cancer that occurs when early forms of nerve cells don't develop correctly.
What is collagen? By Rachel Ross Your body might fall apart were it not for collagen. Good thing a healthy body naturally produces all the collagen it needs.
What is the amygdala? By Nicole Haloupek The amygdala is often referred to as the "fear center" of the brain — but this name hardly does justice to the amygdala's complexity.
Alopecia: Causes, symptoms & treatments for hair loss and balding By Laura Geggel Hair loss is typically considered the domain of aging men, but this equal-opportunity condition — which has many causes — can affect virtually anyone.
Nutria: The Invasive Rodents of Unusual Size By Rachel Ross Nutria, also known as coypu or swamp rats, are large rodents that wreak havoc on their non-native ecosystems.
What Is Heat Exhaustion? By Nicole Haloupek What do football players and sugarcane harvesters have in common? They may all be at risk for heat exhaustion — a hazardous condition that can lead to fatal heat stroke.
What Was the Black Death? By Winston Black, All About History The Black Death killed over half the population of Europe during the Middle Ages.
Pneumonia: Causes, Symptoms and Treatment By Cari Nierenberg Pneumonia is a common infection that causes inflammation in one or both lungs. It's typical symptoms are a cough with phlegm, fever, chills and difficulty breathing.