Trees on Mars?

This picture from the high-resolution camera on NASA's Mars Reconnaissance Orbiter makes it look as if pine trees are growing on the Red Planet. Scientists say the dark streaks are actually trails of debris, created by landslides that occur when carbon dioxide ice melts away from sand dunes near Mars' north pole.

Naturally erupting dust clouds on Mars are creating structures that look surprisingly like trees near the planet's north pole. But don't be fooled — it's just an optical illusion, NASA scientists say.