In this episode, we discuss the basic nature of gravity, one of the four fundamental forces in our universe.

Between them, general relativity and quantum mechanics seem to describe all of observable reality.

The universe is made up of information, similar to a computer, and physics (you know, the basis of the universe) certainly is based on computational principles. But is it running some grand program? Will the answer be 42? Make sure you...

Has a fifth fundamental force been discovered and how will this effect our understanding of the universe?

Black Holes should have no entropy, but they in fact hold most of the entropy in the universe. Let's figure this out.

On this Space Time Journal Club we look at how gravitational waves can be used to search for extra dimensions of space!

Let me tell you a story about virtual particles. It may or may not be true.

Unlock the secrets of Feynman Diagrams. Part 5 in our Quantum Field Theory series.

What do the first stars in the universe, dark matter, and superior siege engines have in common?

Accepting his 2008 TED Prize, physicist Neil Turok speaks out for talented young Africans starved of opportunity: by unlocking and nurturing the continent's creative potential, we can create a change in Africa's future.

Will the future of space exploration be guided by public or private entities? Which is better?

Physics seems to be telling us that it's possible to simulate the entire universe on a computer smaller than the universe

Is our universe a definitive single reality or is it merely one within an infinitely branching multiverse?

Physicist Lee Smolin talks about how the scientific community works: as he puts it, "we fight and argue as hard as we can," but everyone accepts that the next generation of scientists will decide who's right. And, he says, that's how...

SUMMARY

In 1976, Stephen Hawing proposed that Black Holes, do something impossible according to the laws of quantum mechanics. They destroy information. This is a paradox because information should be conserved in the...

How does the indeterminate world of quantum mechanics, where the future isn’t fixed, become the classical predictable real world we experience? Quantum researchers argue about it even today. It's really all...

The many worlds interpretation of quantum mechanics was put forth by graduate student Hugh Everett in 1957. It was considered preposterous at the time, but is now going mainstream. It requires us to...

Part 2 in our Multiverse series.

A Boltzmann brain is not real, but what’s fascinating about it is that it thinks it’s real, and all the memories and experiences it has are real. But, of course, this brain is not real. But how would such a brain know that its...

Particle physicist Nima Arkani-Hamed (Institute for Advanced Study) describes how popular science writing often communicates already outdated ideas to the public.

Nobel Laureate in Physics Roger Penrose (Oxford) briefly summarizes Stephen Hawking's work on the temperature of black holes and Hawking radiation.

A Boltzmann brain is not real, but what’s fascinating about it is that it thinks it’s real, and all the memories and experiences it has are real. But, of course, this brain is not real. But how would such a brain know that its memories...

Physics majors study the universe, from electrons and protons to supergiant stars.



As a physics major you will take A LOT of math and apply complex formulas to the problems at hand. Physics majors don't just learn the...

If you missed part 1



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