It is hard to pick favorite photos from several thousand choices over the years but these two are unique. Both were taken on the same evening - June 28, 2017. As you can see this was a target rich environment for pictures of mammatus. There was virtually no wind at the time - very peaceful following a thunderstorm.
I’d rather have questions that cannot be answered than answers that cannot be questioned.
— Richard Feynman, PhD
Learn more about this remarkable scientist here: