A recent study on the blood-urine barrier gives some reason for ambivalence over the promise of carbon nanotechnology.
Solar panels can only capture so much sunlight and produce a limited amount of electricity. What are the other options for sustainable energy?
We think of ice as snowflakes, ice cubes, snow cones, and dangerous patches on the sidewalk. Scientists have many different ways of categorizing ice too!
What's six times lighter than steel but up to 250 times stronger?