The beauty of nature and science are connected tightly. I always enjoy to find and see the natural flows and how they react with each other naturally. The photo shows the confluence between 2 rivers (Thompson river goes into the Fraser River in Canada). Not only in Canada, but also other places has the similar phenomenon around the world. Although both are rivers, the contrast line is super easy to notice.

Photo: Siacob

Source: https://www.flickr.com/photos/31284484@N02/4472582561/in/photostream/