You've heard of Pompeii and the volcano that wiped it out, but how much do you REALLY know about this incredibly famous place? Turns out there are a lot of mysteries that researchers are still studying, from the timing and causes of...

Mercury, Venus, and Mars are all super low on water – so where did ours come from and why do we have so much of it? We think our water came from a few unlikely sources: meteorites, space dust, and even the sun.

Garik Israelian is a spectroscopist, studying the spectrum emitted by a star to figure out what it's made of and how it might behave. It's a rare and accessible look at this discipline, which may be coming close to finding a planet...

There’s nothing boring about Bennu! From its chemistry, size, shape, and spin to its extremely old age, it proves that even the smallest objects in the solar system have a bizarre and fascinating history.

Learn about how one Japanese startup wants to offer meteor showers on demand, and how this will affect our scientific study of the mesosphere.

In order to understand how we study the universe, we need to talk a little bit about light. Light is a form of energy. Its wavelength tells us its energy and color. Spectroscopy allows us to analyze those colors and determine an object’s...

James Webb captures infrared light, which allows us to see billions of light years away. Some galaxies would not be visible otherwise, because their light has redshifted beyond visible light spectrum due to the...

In 1803, John Dalton formulated his renowned theory of atoms. The principal tenets of his theory were as follows: ₷ Atoms were thought to be the smallest, hardest, densest, and indivisible particles of matter. Every element is...

The discoveries James Webb has made beyond the visible light spectrum.

The success of the Chandrayaan-3 mission raises even more questions about our already mysterious Moon.

NASA Perseverance's close call with Ingenuity and the start of the trip to Jezero crater.

The hangout covers the benefits of biodiversity—and which benefits have been scientifically tested; how biodiversity boosts innovation; and how researchers are measuring biodiversity in the face of environmental...

Learn the basics about the law of constant composition and how to apply it.



The law of constant composition states that in a given chemical compound, all samples are made up of the same elements combined in the same...

In this video, we explore the structure and functions of the major branches of cranial nerve IX (the vagus nerve), specifically in the abdominal cavity.

This program describes the major topographical features of Earth including mountains, plains, and plateaus. Footage from throughout North America takes students to the Rocky Mountains, the plains of Iowa, and the Colorado Plateau to...

Mars 2020 Perseverance Rover Deputy Project Scientist Katie Stack Morgan discusses science objectives of NASA’s first astrobiology-focused mission to the Red Planet.

This segment provides an introduction to aerosols- their varied sources, brief lifetimes, and erratic behavior. Glory's APS will help researchers determine the global distribution of aerosol particles. This unique instrument will...

Life as we know it requires three ingredients: energy, organic...

What's the difference between a physical change and a chemical change? What are elements, compounds, pure substances, and mixtures? So many definitions to learn! Don't worry, Professor Dave will take you through the details.

This video explains the formation and identification of minerals. Major mineral groups, basic crystal systems, the physical properties of minerals, and everyday uses of minerals are discussed. Other terminology includes: inorganic,...