Best E-mail of 2015

All years
Disclaimer: I have no idea whether these e-mails contain any truth whatsoever.
They were just interesting or funny, and I thought they were worth sharing.

Amazingly Beautiful Pictures
These are the best of 2015.

Discovery By a Husband
Emergencies can lead to discoveries.

Eighth Grade Exam (1912)
See how well you do on this eighth grade final exam from Kentucky in 1912.

The Hikers
Three ways to cross a raging river.

Multiple Solar Halos
The most solar halos at once that I've ever seen.

Rock Art
Stunning sculptures made of rocks.