Researchers steering a remote-controlled submarine around the world's deepest known hydrothermal vents have collected numerous samples from sunless depths of the Caribbean Sea where blazing hot, mineral-rich fluid gushes from volcanic chimneys that look like gnarled tree stumps.
Performance-boosting drugs, powered prostheses and wearable computers are coming to an office near you _ but experts warned in a new report Wednesday that too little thought has been given to the implications of a superhuman workplace.
Brighten clouds with sea water? Spray aerosols high in the stratosphere? Paint roofs white and plant light-colored crops? How about positioning "sun shades" over the Earth?