Dark Matter: Is it right in front of us?

Last year, I had just finished my Ph.D. studies, and had moved to Madison, WI to teach introductory physics at the University of Wisconsin. I was working on this paper, and when I submitted it, I got a phone call from New Scientist magazine’s space division. Fast-forward two weeks, and I find this article online, … Read more

Centripetal vs. Centrifugal force, & the Solar System

One of the worst teaching tools physicists use (and they almost all do it) is to tell students, There’s no such thing as centrifugal force. What can you do when the top physics education website says, “It is important to note that the centrifugal force does not actually exist. We feel it, because we are … Read more

Brain-damaged arguments and Boltzmann Brains

Okay, so I got a question from my friend Tamara, who’s a high school teacher in my hometown of New York City. It concerns a recent article she read on the front page of the New York Times about something funny that us scientists are calling Boltzmann Brains. I’ve read this article three times since … Read more

An amazing video on Evolution and Intelligent Design

Evolution, creationism, and intelligent design are words that many people have extremely strong opinions about. Regardless of how you feel about why the laws of nature are what they are, which have evidently allowed us to exist, the evidence for the validity of the theory of evolution with one major mechanism being natural selection is … Read more

MOND vs. Dark Matter

The first serious advocate of modifying Newton’s laws instead of postulating unseen (or dark) matter was Moti Milgrom, from whom today a new article appears on the astrophysics preprint archives. In particular, Milgrom asserts the following: MOND predictions imply that baryons alone accurately determine the full field of each and every individual galactic object. These … Read more

What is that Background?

Taking a look at the background picture, and wondering what it is?  It’s the Bullet Cluster, also known to astronomers as 1E 0657-56. What’s so special about it? Well, these are actually two galaxy clusters that are in the process of merging, and are colliding with one another! Although this is very cool (and rare) in … Read more