Scientists mimic photosynthesis with a new hydrogel to produce hydrogen using sunlight, promising cleaner energy solutions.

Too much of a good thing is no good at all. Living organisms enjoy sunlight—in fact, they need it to stay alive—but they tend ...

Why do I feel better rested when I wake myself up than I do if my alarm or another person wakes me up? – Calleigh H., age 11, Oklahoma We’ve all experienced this: You’re in the middle of a lovely ...