Birds-of-paradise are sending secret color signals invisible to human eyes, scientists say
Birds-of-paradise are even colorful in the dark, with feathers and body parts that glow a brilliant yellow-green under ...
How carbon nanotubes give out more than they receive
Three RIKEN physicists have discovered how tiny tubes of carbon spit out light that is more energetic than the light shone on them. This finding could help to exploit the process in applications such ...