Physics Detective's latest activity

No. Like predators like meat. Fresh. Still warm if possible. Or better still, still alive. This is a very good reason for not using...

I've seen what appeared to be satellites making abrupt right-angle turns. On one particular occasion there were two of them, one...

@SleipnirTheHorse : how about because they like meat.

I think you can be sure of the distinction between genuinely possible things, and speculative things for which we have no evidence...

We will have to agree to differ on that.

How about a gamma railgun?

Make it a "gamma gun". A gun which emulates a gamma ray burst, and is powered by the 100% conversion of matter into energy. The amount...

Is a table levitating possible, even at a minuscule probability? No. Some of the examples above are associated with genuine...

OK noted.

All points noted Mitchell. Yes I guess it would be a major thread derail. Apologies, I will leave it there.

You will be aware of Newton's infinite universe. It's mentioned here and here. Gravity should have caused all the stars to "fall down in...

Ouch. That paper is above my pay grade, Mitchell. I'm an amateur, an IT guy who's read a lot of old papers, not a mathematical...

I remember when people used to say "the universe was once the size of a grapefruit". Then after the WMAP results in 2006 I think, this...

Tim: at 38 pages, this is a big paper. Apologies, I've only looked at the abstract and the discussion, with my historian hat on. It...