Sometimes, the acceptance of a lack of knowledge is far more valuable than conjecture. That being said, let’s talk about what we do know, because regardless, it is very weird.

What happens when black holes collide? What is the speed of gravity? There are so many weird questions related to gravitational waves.

Cosmic inflation is a theory that was proposed in the 1980s by cosmologist Alan Guth to answer some of the most fundamental questions of the origins of our universe. It also solved the Horizon Problem and the Flatness Problem.

From Newton's laws to E=mc2, we think we have uncovered the secrets of the universe. But some claim these laws evolve and others point to their human and cultural origins. Might eternal natural laws be human hubris? Or is the mind of God...

The Physics Girl team visited LIGO once again. This place is Dianna's obsession.

You've probably heard the term Dark Matter, but what is it, and how do we know it exists?

Daniel Kinderlehrer, MD, is a nationally recognized physician with expertise in the fields of nutrition, allergy, environmental medicine, Lyme disease, and the healing of mind-body-spirit as a unified whole. He co-founded The New England...

The Nobel Prize is often viewed as the ultimate achievement in science. But to what extent would you go to win it? In 2014, astronomer Dr. Brian Keating invented BICEP2, the most powerful cosmology telescope ever made. Using this, he...

We've gone through some of the main advancements in modern physics, which brings us to the here and now! What are physicists currently working on? One huge area of interest is developing a quantum field theory for the gravitational...

Inflation video with Alan Guth:

There's more to the cosmos than meets the eye. About 80 percent of the matter in the universe is invisible to telescopes, yet its gravitational influence is manifest in the orbital speeds of stars around galaxies and in the...

Time runs backward in this exploration of why time runs forward, to the tune of Billy Joel's "For The Longest Time"

The universe is microwaving itself. A mystery signal discovered in the 1960s led to a Nobel prize. In this video, Dianna explores one of the most mysterious discoveries in physics - a constant microwave signal that seemed to be coming...

The ill-fated "discovery" of primordial gravitational waves in the cosmic microwave background, explained in a cosmology rendition of Disney's "The Circle of Life" from the movie "The Lion King"

We've talked at great length about the beginning of the universe, everything we know, and what we don't yet know. But everything that has a beginning must have an end. How will the universe end? How can we tell? When will it happen?...

At the beginning of this series, we talked about the Big Bang, which was the beginning of our universe, and what happened in the early epochs thereafter. But what we didn't talk about was how we know all that stuff! What is the evidence...

So we've made it all the way to the 20th century with the history of astronomy. Plenty had to happen to get us to that point, but the most amazing stuff is yet to come! Shortly after Einstein did his best work, a guy named Edwin Hubble...

If we want to learn about the universe, we have to start at the very beginning. How and when did the universe begin? Is it even possible to know about such things? Yes, it is! That's what cosmology is all about, the origin and...

Do you want to learn about space stuff? Do you want understand stars and galaxies, black holes and quasars, dark matter and all the rest? This is the playlist for you! We will start at the beginning of the universe, and get all the way...