Tag Archives: physics

Slate: 4 Reasons you Shouldn't Exist

Greetings, true believers. I have a piece up at Slate today: Four Reasons You Shouldn’t Exist: Physics says you’re an impurity in an otherwise beautiful universe.. The headline might be a bit over the top, but it’s a fun little … Continue reading

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Lensing Animations

I have an amazing undergraduate research student this summer, who I won’t name so as not to embarrass her. But I wanted to share an awesome gravitational lensing that she put together for me after only a couple of days … Continue reading

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Ask a Physicist: How does Spacetime get Bent?

My latest column is up at io9: “How does Spacetime get Bent?” It’s an overview of how to think about curved spacetime, even if the universe “really” feels flat. Enjoy! -Dave

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Ask a Physicist: A Practical Guide to Intergalactic Travel

Good news everyone! I have a new column on io9: How to Make it to the Edge of the Observable Universe in a Few Decades. This is one of the most fun columns I’ve written in ages, so please do … Continue reading

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I get email: WHY (not how) does speed and mass affect time?

Credit: Herb Thornby As you may know, I’m teaching a General Relativity course this term, and so I have spacetime on the brain. So it’s particularly fun when I get relativity-oriented emails. This morning, for instance, I found a question … Continue reading

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Ask a Physicist: How Much Does Antimatter Weigh?

My latest column is up, and it’s a fun one. Does antimatter have antigravity? Only one way to find out for sure! In other news, I’ll be on a panel at the Library Journal Day of Dialog May 29 (NYC). … Continue reading

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Ask a Physicist: Will the Universe End in a Big Rip

Credit: New Scientist Enough with the random announcements! It’s time for some science! I have a new column up on io9: Will the Universe End in a Big Rip? For those too impatient to read through, the answer is “maybe,” … Continue reading

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Danica McKellar blurbed my book!

Okay, just one more, and only because it’s pretty insane. Danica McKellar (who you may also remember as Winnie Cooper from the Wonder Years) has written a really nice blurb for the Universe in the Rearview Mirror: This is a … Continue reading

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I get mail: Does a box of photons have mass?

Lately, my my inbox hath overflowed. Yesterday, I got a thought-provoking email from a fellow physics instructor. It’s a good, non-intuitive question about special relativitiy. It’s also got the “technical” tag, so if you’re afraid of a few equations and … Continue reading

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I get email: How could everything be packed into an infinitesmal universe?

A few days ago, I posted my first io9 column in quite a while, and it seems like there was substantial pent-up demand to ask a real, live physicist questions about the universe. I apologize for my neglect. While the … Continue reading

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