Albert Einstein shattered previous ideas about time, but left many pivotal questions unanswered: Does time have a beginning? An end? Why does it move in only one direction? Is it real, or something our minds impose on reality?

A few decades ago, we knew of no other planets beyond those in our solar system. Today, astronomers have confirmed over 700 planets circling other suns and believe billions more lay undiscovered.

Fire tornadoes and color changing liquids are all part of what keeps Annopa Singh’s chemistry class engaged. Science teachers prepare tomorrow’s pioneering scientists. Episode filmed live at the 2017 World …

Looking millions of light-years into deep space requires a special kind of glass telescope. Prior to the 1980s telescopes were limited in size and too heavy to follow the motion …

Drawing on a range of disciplines, this provocative program looked at how discoveries in areas like fundamental physics, anthropology, and genomics are influencing our understanding of uniquely human characteristics.

Medical ecologist Dickson Despommier describes the Vertical Farm Project, a movement to promote urban renewal while producing a sustainable food supply. The project is a result of his years studying …