[x-post] "The northen Hawk Owl is an explosive killer, and extremely hard to capture. 1/2000 of a second shutter speed and 5 hours in -22 Celsius got me the shot :)"

"Tube Map" of the global submarine fibre-optic cable network, produced by Oxford University

Suppose you have a time machine that can only jump to leap days. What's the chance that a random jump will put you on a Monday? [Maths]

Here’s a puzzle for you – Like the TARDIS, your time machine has a fault. The fault isn’t a failure…

Why are different kinds of stars found 'between' the spiral arms of our galaxy than in them?

I was elsewhere in Reddit when somebody made the claim that the space between the spiral arms of our galaxy…