The biggest news in cosmology in recent years is that the mysterious universe-accelerating entity we call dark energy may be fading away. The evidence for this is now strong enough that enormous effort is going into confirming this...

The oldest rocks on Earth are more than just ancient—they’re time machines, holding clues to Earth’s missing history and revealing what happened in the unknown times after the Big Bang. We’ll work with our Adam and Joss from Howtown to...

Where are you right now? Until you interact with another particle you could be any number of places within a wave of probabilities. This is only one way that quantum mechanics challenges our perception of reality. Matt dives into these...

The search for a single number: the hubble constant, which is the rate of expansion of our universe, has consumed astronomers for generations. Finally, two powerful and independent methods have refined its measurement to unprecedented...

Invisible to the naked eye, our night sky is scattered with the 100s of billions of galaxies the fill the known universe. Like the stars, these galaxies form constellations – hidden patterns that echo the reverberations of matter and...

Reality has cracks in it. Universe-spanning filaments of ancient Big Bang energy, formed from topological defects in the quantum fields, aka cosmic strings. They have subatomic thickness but prodigious mass and they lash through space at...

I don’t want to alarm you, but the world is going to end. All of this. Gone. And scientists are certain all of this will happen. On the bright side this isn’t going to happen for 4-5 billion years. It makes me wonder: In a universe...

Challenge question: if 1kg of apples is $5 and 2kg is $10, how much is -1kg of apples? The answer? Priceless. Because you could use negative-mass apples to build warp drives, travel in time, and construct a perpetual motion machine. In...

Scientists at the Large Hadron Collider may have just discovered a new fundamental particle that could change the way we look at the universe. Is this Dark Energy? A giant Neutrino? The big brother of the Higgs Boson? Or could it be the...

Space is big, and it’s getting bigger. But where does all that new space actually come from? And is it popping into existence all around you right now? Is that why the remote control is always further away than I thought?

Dr. Who is one of the longest running TV shows on the BBC, and it's got a huge fandom surrounding it, called Whovians. And while it might not seem like, Whovianism, might just be religion! Whovians, like other passionate fan cultures,...

What exactly are the invisible things out there, and how did they help form the universe as we know it? To explore and understand the most spectacular structures out there, scientists have been using cosmic shear to indirectly detect...

Hank gives us an inclusive overview of how everything in the universe is thought to have begun, and how cosmologists predict it will all come to an end. Now get happy!

Just now, somewhere in the universe, a star exploded. In fact, a supernova occurs every second or so in the observable universe. Yet, we’ve never actually been able to watch a supernova in its first violent moments. Is early detection...

We might be able to use slime molds to help predict the shape of matter in the universe, and the Rosetta mission may have figured out why many comets seem to be missing a bunch of nitrogen.

It's time for the end. At least the end of our first series on Physics here at Crash Course. In this episode of Crash Course Physics, Shini sits down to talk about Astrophysics and Cosmology. By using what we've learned this year, we can...

Every star, black hole, human being, smartphone and atom are all constantly pulling on each other due to one force: gravity. So why don’t we feel pulled in billions of different directions? And is there anywhere in the universe where...

Hank talks to some VIPs from CERN about the question on everyone's mind: does the Higgs Boson particle exist? And describes how CERN is going about finding the answer.

Hank interviewed Sergio Bertolucci on October 11, 2011 and Rolf...

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Are black holes the source of dark energy? A new study by Farrah et al, published in February of 2023 claimed to have found a solution to dark energy, showing a connection with supermassive black ho

les....

Indigenous Peoples have thrived across the eastern portion of present day United States for more than 10,000 years, forming hundreds of distinct cultures and Nations. In this video learn about the Wampanoag, Anishinaabeg, and Cherokee...

Part 2 in our Multiverse series.

Why Earth 2.0 may not be such a feasible place for people to live.

40 Jupiter Mass Binary Objects - or JuMBOs - discovered by JWST.

The three human figures and two animals that make up the Blythe Geoglyphs - or Blythe Giant Intaglios - are enormous. So big in fact, that they can’t be fully appreciated from the ground. But the figures were carved into the earth long...