Hummingbird Feeders. Hummingbirds get the energy they need to maintain their astonishing metabolism primarily from flower nectar and the sugar water they find at feeders (here's the recipe). Think of them as miniature flycatchers, and sugar is just the fuel for getting their real nourishment.
afÂ·terÂ·imÂ·age. n. A visual image that persists after the visual stimulus causing it has ceased to act. Also called photogene. (ËÉËftÉrËÉªmÉªdÊ).
EEG allows you to record brain processes that occur shortly after the onset of visual or auditive stimuli (there are consistent brain processes already after 50-100 ms post-stimulus), but you can also monitor brain states reflecting engagement, motivation or drowsiness over longer periods (hours to days).