but you can also see it in the summer. That’s because it’s where light refracts off the ice crystals present in a thin veil of cirrus clouds. So we can have those form in the summertime.

The production of the light in these beetles is an example ... Depending on the river and the species of salmon, this phenomenon starts in the summer and continues into the fall.

It's a remarkable phenomenon that's also remarkably ... And these lightning bugs with their flickering light shows make summer nights feel all the more magical and romantic. But how did fireflies ...