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Is fire a solid, a liquid, or a gas? - Elizabeth Cox
What causes heartburn? - Rusha Modi

What Causes Heartburn, And How Can It Be Stopped?

Heartburn, scientifically known as Gastroesophageal Reflux Disease, or GERD, is a condition in which digestive acids from the stomach spurt out to the esophagus giving you a burning sensation in the middle of your chest. So what causes this, and how can it be stopped?

does time exist

Does Time Exist?

Observing the Sun, the moon and the stars has led us to wonder about the passage of time. But what exactly is time? Does it even exist? Back in the day, we used to rely on natural cycles like changes from day to night, changes in seasons to make calendars until a more convenient time-keeping devices came along to make more sense of our perception of time.

why can't some birds fly

Why Can’t Some Birds Fly?

Flightlessness, in most cases, evolves after a bird species begins to settle on predator-free island. To match their new behavior, their bones - once hollow to minimize weight - become dense, sturdy feathers become fluffy, and their wings either shrink or disappear completely.

The fascinating science behind phantom limbs

The Fascinating Science Behind Phantom Limbs

Anyone who has lost a limb can still feel it. Even someone born without one can still feel a phantom. Why is that? This TED-Ed video based on lessons by Joshua W. Pate explains the fascinating science behind phantom limb sensations.

Janna Levin - The sound the universe makes

The Sound The Universe Makes

The space isn’t a silent place. In this TED Talk, Janna Levin, a professor in Physics, says the universe has a soundtrack -- a sonic composition that records some of the most dramatic events in outer space as they unfold.

Raindrops Shape

What Do Raindrops Really Look Like?

A falling raindrop doesn’t look like a tear drop. Because of surface tension, the water drops split as they fall forming the shape with the smallest surface area for its volume, which is an imperfect sphere.

How a dragonfly's brain is designed to kill

How A Dragonfly’s Brain Is Designed To Kill

When a dragonfly sees a smaller insect, it has about 97 percent chance of catching it for a meal. So how can something with so few neurons be one of the most efficient killers in the entire animal kingdom? Neuroscientist Greg Gage explains.

What would happen if every human suddenly disappeared?

What Would Happen If Every Human Suddenly Disappeared?

We have affected Earth so profoundly that most scientists believe we have left a permanent mark on Earth’s geological record. Humanity hasn't always been here, and we know that we won’t be here forever. But what would happen if we suddenly disappeared?

How We Could Build a Moon Base TODAY – Space Colonization 1

How Could We Build A Moon Base Today?

We often dream about leaving Earth and becoming a space traveler. The reality is, we could begin our dream by setting up a Lunar Base today. Here’s how our first Moon base could be completed in a decade.

Why Haven't We Cured Cancer Yet?

Why Haven’t We Cured Cancer Yet?

Technological advancements surely have helped increase cancer survival rates, but why isn’t there a cure for cancer yet? We are well-versed with the importance of treatments like chemotherapy and radiation therapy, but are there any more advance treatments we can look forward to?

Hasini Jayatilaka - How cancer cells communicate — and how we can slow them down

How Cancer Cells Communicate — And How We Can Slow Them Down

Cancer cells communicate with each other and coordinate their movement throughout the body. But this process can be interrupted. In this TED Talk, Hasini Jayatilaka shares her work on an innovative method to stop cancer cells from communicating -- and halt their fatal ability to spread.

NASA Is Flying A Spacecraft Into The Sun For The First Time

Why Is NASA Sending A Spacecraft To The Sun?

Early today (Aug. 11),  NASA is launching its newest spacecraft, called the Parker Solar Probe. The probe's mission is to study the outer corona of the Sun to better protect our tech-driven lifestyle against destructive solar storms that could take us back to the stone ages.

Raindrops Shape

What Do Raindrops Really Look Like?

A falling raindrop doesn’t look like a tear drop. Because of surface tension, the water drops split as they fall forming the shape with the smallest surface area for its volume, which is an imperfect sphere.

What would happen if every human suddenly disappeared?

What Would Happen If Every Human Suddenly Disappeared?

We have affected Earth so profoundly that most scientists believe we have left a permanent mark on Earth’s geological record. Humanity hasn't always been here, and we know that we won’t be here forever. But what would happen if we suddenly disappeared?

Why Haven't We Cured Cancer Yet?

Why Haven’t We Cured Cancer Yet?

Technological advancements surely have helped increase cancer survival rates, but why isn’t there a cure for cancer yet? We are well-versed with the importance of treatments like chemotherapy and radiation therapy, but are there any more advance treatments we can look forward to?

Hasini Jayatilaka - How cancer cells communicate — and how we can slow them down

How Cancer Cells Communicate — And How We Can Slow Them Down

Cancer cells communicate with each other and coordinate their movement throughout the body. But this process can be interrupted. In this TED Talk, Hasini Jayatilaka shares her work on an innovative method to stop cancer cells from communicating -- and halt their fatal ability to spread.

The fascinating science behind phantom limbs

The Fascinating Science Behind Phantom Limbs

Anyone who has lost a limb can still feel it. Even someone born without one can still feel a phantom. Why is that? This TED-Ed video based on lessons by Joshua W. Pate explains the fascinating science behind phantom limb sensations.