National Geographic News recently stated that a species of Russian moth with a thirst for human blood demonstrates “evolution at work.”¹ The moth, Calyptra thalictri, was filmed boring into a researcher’s thumb, evidently to draw a blood meal.

Sand and other sediments can be transported by rivers and floods, but what kind of forces—and how much water—would it take to move thousands of cubic miles of sand from one side of a continent to the other?

Almost all behavioral experts would agree that good communication is key to the survival of a healthy relationship. This principle also holds true in the plant world.

Using satellite photos in conjunction with geochemical analyses, a team of researchers has proven the existence of a now-buried lake and river system that once operated in the middle of the Sahara desert in North Africa.

by Brian Thomas, M.S. and Christine Dao*