Infinity is not classified as a normal number, and some infinities are bigger than others. Mathematician Eugenia Cheng explores these and other conundrums of this complex concept.
In states where same sex-marriage was legalized, the suicide attempts among gay, lesbian, and bisexual teens dropped by 14 percent.
Sometimes taking something apart can reveal insight into how it works.
Six inspiring science teachers have turned Science Friday media into innovative classroom resources.