The 2005 Hurricane Katrina caused severe flooding in New Orleans.

Lightning can strike the same location multiple times.

Some plants like the telegraph plant move their leaves visibly in response to light — observable without time-lapse.

Plato's allegory of the cave describes prisoners who mistake shadows on a wall for reality.

The touch-me-not plant (Mimosa pudica) closes its leaves when touched and remembers the stimulus for weeks.

Rainbows form when light refracts and reflects in water droplets.

The United States has lost half its wetlands since European settlement — reducing flood protection and wildlife habitat.

Lightning can heat air hotter than the surface of the Sun.

Thundersnow — lightning during a snowstorm — occurs when thunderstorm conditions coincide with temperatures below freezing.