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I don't know very much about bobsleds—but I know quite a bit about physics. Here is my very brief summary of the bobsled event in the winter Olympics. Some humans get in a sled. The sled goes down an incline that is covered in ice. The humans need to do two things: push really fast…

Attendance at this weekend’s March for Science is expected to be lower than last year's, when hundreds of thousands of people took to the streets across the country to protest the Trump administration and its science policies. Many anti-Trump protesters say their attention is now focused on other forms of action, such as filing lawsuits…

Maybe you have watched Stranger Things but maybe you haven't. I've seen it, and I thought it was great—and not just because there's lots of science in it. Don't worry, I'm not going to talk about multiple universes or quantum tunneling. Instead I am going to talk about salt. Small spoiler alert (but not really…

Every week science journalists get a bunch of emails from various Respectable Scientific Journals telling us, in advance, what articles those journals are going to publish. When I started in this game, these tables of contents came by fax; today, in the future, they're downloadable PDFs. The quo for all this quid is that we…

In early 2016, two planetary scientists declared that a ghost planet is hiding in the depths of the solar system, well beyond the orbit of Pluto. Their claim, which they made based on the curious orbits of distant icy worlds, quickly sparked a race to find this so-called Planet Nine—a planet that is estimated to…

Florida’s space coast roared to life on Tuesday as SpaceX fired off its long-in-development Falcon Heavy rocket from Kennedy Space Center. Tens of thousands of spectators made the pilgrimage from across the country to experience the immense heat and thunderous roar of the rocket’s 5 million pounds of thrust. Upon liftoff, at precisely 3:45 pm…

In the unfolding family separation crisis at the US-Mexico border, one thing has become increasingly clear; the federal government lacks any real plan for reuniting children with their parents. On Wednesday, President Trump signed an executive order that would keep children and their parents together, though in indefinite detention. But the administration’s “zero-tolerance” policy reversal…

I have a problem: I can't stop analyzing Star Wars movies. On top of that, there is another issue. I've stated that the physics of a movie doesn't have to be absolutely correct—and I still believe that. And now, I am going to complain about some physics in Star Wars: The Last Jedi even though…

Sometimes, when I'm proctoring an exam, I end up with a little too much time on my hands. So I play with stuff—whatever I've got on hand. In this case, it was one of those clicky pens. It had stopped writing, so I assumed it was out of ink. Of course it might not be…

Built well, a city should provide a bulwark against disaster. Fundamentally, all cities are fortresses. Or at least they should be. If a city is a fortress, where’s the wall? The edges of North American cities today aren’t edge-like at all. Most of them, especially in the West, ooze outward in a gradient, urban to…