Given how many vast deserts there are on Earth, it seems strange to think that we’re running low on sand for construction applications—but desert sand grains are predominantly eroded by wind, making them too fine and not as suitable for construction as more angular water-eroded sands.

The name of the American rock band REO Speedwagon isn’t just a fanciful (and potentially fun to say) name—the band was named after the early 20th century ancestor of the modern pickup truck, the REO Speed Wagon.

The deepest point in the Mediterranean Sea is the Calypso Deep, located south-west of Pylos, Greece with a maximum depth of 17,280 feet (5,267 meters). The extreme depth can be attributed to the subduction of the African Plate sliding under the Aegean Sea Plate, which creates the Hellenic Trench.