Angles, Stars, Owls

Langley's Adventitious Angles

I came across this puzzle a couple of days ago. It's incredibly hard yet it only needs a bit of basic geometry to solve. The trick to solving it is rather clever and I enjoyed it tremendously.

Missing Star

A star has disappeared! It was imaged by Hubble, but now it's not there any more. There was no supernova, so maybe this means that a massive star can turn into a blackhole without turning supernova first. More information can be found at the Astronomy image of the day for a couple of days ago.

Owls and Lemmings

Snowy owls feed on lemmings. Lemmings have good years every 4 years. In one of these good years, a snowy owl built its nest from 70 dead lemmings!