Which of these facts published in Science Recorder about sleep did you already know?

5. Dreaming in color is more common than it was before the invention of color television. We believe that dreams are in black and white, however, the proclivity for dreaming in color has actually increased over time.

6. Giraffes and other Asiatic mammals only sleep two hours per night. Unlike koalas, these mammals spend the majority of their time doing things rather than sleeping.