If you are a medical student or resident… You’re welcome!

There are teachers, and then there are master educators… Dr. BK Titanji is an infectious disease expert at Emory who recently posted this on Bluesky:

I emailed her to ask her for the original PDF so I could post it here with better resolution. This is not just a great tool for anyone who prescribes antibiotics, it’s a beautiful example of how to teach complex subjects.

How old are you on Mars?

It’s an interesting thought experiment… and a reminder of how time (the way we use it) is a construct.

Here’s the link to manyhappyorbits.com so you can see how old you are on other planets.

Cosmic Smile

While we’re on the topic of space, time, and the space-time continuum….

The ring around the galaxy cluster in this amazing photograph is called an “Einstein ring” (because he predicted that it would exist).

“An Einstein ring, also known as an Einstein–Chwolson ring or Chwolson ring (named for Orest Chwolson), is created when light from a galaxy or star passes by a massive object en route to the Earth….Gravitational lensing is predicted by Albert Einstein‘s theory of general relativity.^[1] Instead of light from a source traveling in a straight line (in three dimensions), it is bent by the presence of a massive body, which distorts spacetime. An Einstein ring is a special case of gravitational lensing, caused by the exact alignment of the source, lens, and observer. “(Wikipedia, Einstein Ring)