Why are there so many types of apples?
Adults Biology
Have you ever walked into a grocery store and wondered where all the varieties of apples came from?
How Do Animals See in the Dark?
Adults Biology
To human eyes, the world at night is a formless canvas of grey. Many nocturnal animals, on the other hand, experience a rich and varied world, bursting with details, shapes, and colors.
What is the biggest single-celled organism?
Adults Biology
The elephant is a creature of epic proportions - and yet, it owes its enormity to more than 1,000 trillion microscopic cells.
How a single-celled organism almost wiped out life on Earth
Adults Biology
There's an organism that changed the world. It caused the first mass extinction in Earth's history
What Is Life? Is Death Real?
Adults Biology
So what is the difference between you and a rock? This seems like an easy, even stupid question. But even the smartest people on earth have no idea where to draw the line between living and dead things.
Why do we hiccup?
Adults Biology
The longest recorded case of hiccups lasted for 68 years ... and was caused by a falling hog. While that level of severity is extremely uncommon, most of us are no stranger to an occasional case of the hiccups. But what causes these 'hics' in the first place? John Cameron takes us into the diaphragm to find out.
What is obesity?
Adults Biology
Obesity is an escalating global epidemic. It substantially raises the probability of diseases like diabetes, heart disease, stroke, high blood pressure, and cancer.
How the choices you make can affect your genes
Adults Biology
Here's a conundrum: Identical twins originate from the same DNA ... so how can they turn out so different - even in traits that have a significant genetic component?
We Can Now Edit Our DNA. But Let's Do it Wisely
Adults Biology
Geneticist Jennifer Doudna co-invented a groundbreaking new technology for editing genes, called CRISPR-Cas9. The tool allows scientists to make precise edits to DNA strands, which could lead to treatments for genetic diseases.
What Are You?
Adults Biology
So. Are you your body? And if so, how exactly does this work? Lets explore lots of confusing questions.
Why do some people have seasonal allergies?
Adults Biology
Ah, spring. Grass growing, flowers blooming, trees budding. For those with allergies, though, this explosion of new life probably inspires more dread than joy. So what's behind this annual onslaught of mucus? Eleanor Nelsen explains what happens when your immune system goes rogue.
Which Fish Did We Evolve From?
Adults Biology
Today's oceans are full of fish with fins that couldn't evolve into limbs like ours. So, who are our ancestors and where did they go?
How do schools of fish swim in harmony?
Adults Biology
How do schools of fish swim in harmony? How do the tiny cells in your brain give rise to the complex thoughts, memories, and consciousness that are you?
What would happen if you didn't drink water?
Adults Biology
Water is essentially everywhere in our world, and the average human is composed of between 55 and 60% water. So what role does water play in our bodies, and how much do we actually need to drink to stay healthy? Mia Nacamulli details the health benefits of hydration.
Self-healing concrete
Adults Biology
The secret? Believe it or not, it's bacteria.
What Happens When You Die?
Adults Biology
What happens after you die?
How do dogs "see" with their noses?s
Adults Biology
You may have heard the expression that dogs 'see with their noses.' But these creature's amazing nasal architecture actually reveals a whole world beyond what we can see. Alexandra Horowitz illustrates how the dog's nose can smell the past, the future and even things that can't be seen at all.
Colour Mixing: The Mystery of Magenta
Adults Biology
Why doesn't magenta appear in the rainbow? The answer lies not in physics but in biology.
The First "Glowing" Sea Turtle Has Been Discovered
Adults Biology
While filming coral off the Solomon Islands, David Gruber, a National Geographic Emerging Explorer, encountered a "bright red-and-green spaceship." This underwater UFO turned out to be a hawksbill sea turtle, which is significant because it's the first time that biofluorescence has ever been seen in reptiles, according to Gruber. Gruber is now excited to learn more about this critically endangered species and how it is using biofluorescence.
Does Stretching/Warming Up Actually Help?
Adults Biology
Could stretching negatively affect performance?