How Can Astronauts Tell How Fast They’re Going?

Weirdly, spaceships have no direct way to gauge their own speed. Luckily, we can use some physics tricks to figure it out.
BBC

Constructions and loci

Practise these constructions until you can do them without looking at the instructions. Follow the instructions and draw this perpendicular bisector of a line segment construction. Without changing ...
Healthline

The Most Common Signs of Gluten Intolerance

There are several gluten-related disorders (GRDs), including celiac disease, non-celiac gluten sensitivity (NCGS), and wheat allergy. Celiac disease is the most severe GRD. Without treatment, it can ...
The Washington Post

Dan Lamothe

Dan Lamothe joined The Washington Post in 2014 to cover the U.S. military. He has written about the Armed Forces since 2008, traveling extensively, embedding with five branches of service and covering ...