This natural draft furnace can reach temperatures of 1200 Deg C with no mechanical assistance.
This robotic scarecrow uses lasers to shoo birds from crops.
AQUAIR is a device that uses some locally sourced materials to draw usable water from the air in temperate climates. The invention could be useful to poor countries dealing with water scarcity.
A team at Stanford University are currently using a fiber optic network underneath their campus, to sense oncoming earthquakes.