Listen to John Ochsendorf, engineer and architectural historian at MIT, talk about what we can learn about "green" design from buildings that are hundreds or thousands of years old.
The newly launched tower in Spain has over 1,200 mounted mirrors that follow the sun's path throughout the day. The heat energy from the sun powers a steam turbine to generate electricity, and can be stored for later use, says Mark Mehos.
Matt Wilson was able to gain insights to the structure of memory, it seems to be composed of short segments, compressed and replayed in fractions of seconds.