This National Geographic photo contains
common duckweed, lesser duckweed, lemna minor, duckweed, beech, and beech tree.
There might also be
pondweed, oregon maple, big leaf maple, acer macrophyllum, and live oak.
How do you measure something that destroys everything it touches? That’s an essential question for tornado researchers. After he narrowly escaped the largest twister on record—a two-and-a-half-mile-wide behemoth with 300-mile-an-hour winds