Quotes from Lawrence M. Krauss

T]he declaration of a First Cause still leaves open the question, Who created the creator? After all, what is the difference between arguing in favor of an eternally existing creator versus an eternally existing universe without one?

But relying on invisible miracles is the stuff of religion, not science. To ascertain whether this remarkable accident was real, physicists relied on another facet of the quantum world. Associated with every background field is a particle, and if you pick a point in space and hit it hard enough, you may whack out real particles.

Nevertheless, all of these phenomena imply that, under the right conditions, not only can nothing become something, it is required to.

one of the dumbest academic decisions ever made (and that is a tough list to top), Maxwell was unceremoniously laid off.

While the nature of this radiation will give no information whatsoever on what fell into the black hole

At the heart of quantum mechanics is a rule that sometimes governs politicians or CEOs—as long as no one is watching, anything goes. Systems

Special relativity says nothing can travel through space faster than the speed of light. But space itself can do whatever the heck it wants, at least in general relativity. And as space expands, it can carry distant objects, which are at rest in the space where they are sitting

the universe could have expanded during this inflationary period by a factor of more than 1028. While this is an incredible amount, it amazingly could have happened in a fraction of a second in the very early universe.

Indeed, the best answer I have ever heard to the question of what it would be like to be dead (i.e., be nonbeing) is to imagine how it felt to be before you were conceived.

escape the shackles of our prior experience to uncover profound and beautiful simplifications and predictions

The tapestry that science weaves in describing the evolution of our universe is richer and far more fascinating than any revelatory images or imaginative stories that humans have concocted. Nature comes up with surprises that far exceed those that the human imagination can generate.

The forces that govern our experience, electromagnetism and gravity, are blind to the distinction between left and right. No process moderated by either force can turn something such as your right hand into its mirror image. I cannot

children will be able to tell than the story we have told? Surely that is the greatest contribution of science to civilization: to ensure that the greatest books are not those of the past, but of the future.

El universo no es solamente más raro de lo que suponemos, sino más raro de lo que podemos suponer.   J. B. S. HALDANE, 1924

Everyone (with the exception of certain school boards in the United States) now knows that the universe is not static but is expanding and that the expansion began in an incredibly hot, dense Big Bang approximately 13.72 billion years ago.

Hubble's law: There is a linear relationship between recessional velocity and galaxy distance. Namely, galaxies that are ever more distant are moving away from us with faster velocities!

There are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that we know we don't know. But there are also unknown unknowns. There are things we don't know we don't know.

For you are a mist that appears for a little time and then vanishes. —JAMES 4:14

In a flat universe, and only in a flat universe, the total average Newtonian gravitational energy of each object moving with the expansion is precisely zero! This is what makes a flat universe so special. In such a universe the positive energy of motion is exactly canceled by the negative energy of gravitational attraction.

Light travels faster in warmer, less dense air than it does in colder air.

Even if the asymmetry were 1 part in a billion there would be enough matter left over to account for everything we see in the universe today. In fact, an asymmetry of 1 part in a billion or so is precisely what was called for, because today there are roughly 1 billion photons in the cosmic microwave background for every proton in the universe. The CMBR photons are the remnants, in this picture, of the early matter-antimatter annihilations near the beginning of time.

The source of the infinity is easy to describe.

Some theorists have estimated that there are perhaps 10500 different possible consistent four-dimensional universes that could result from a single ten-dimensional string theory.

measurement of a system can alter its behavior