Paleontologists in Alberta, Canada, have recently unearthed “a mass grave on a monumental scale.”¹ The BBC story speaks of

Thousands of dinosaurs [that] were buried here, killed in an instant on a day of utter devastation.

Earth’s oceans contain 321 million cubic miles (1.335 billion cubic kilometers) of water. The moon causes ebb and flow of tides twice in a 24-hour period, while the wind, density variations, and tides contribute to the massive ocean currents. These currents prevent oceanic stagnation and help circulate vital moisture and heat around the globe. But where did all this water come from?

Cicadas are an unusual-looking insect belonging to the order Hemiptera (the true bugs, including bed bugs and aphids). If you live in the eastern United States or in the Midwest, you have undoubtedly heard their long raucous calls on summer days. They produce their characteristic sound via unique structures called tymbals.