A Nobel Prize, of course. Such was the case for Hans Krebs, the biochemist who nabbed the award in 1953 for discovering the citric acid cycle, or “Krebs cycle”—the cellular pathway that converts ...

Explore Leonardo da Vinci's most famous works like the Mona Lisa, as well as his drawings and unfinished works. In 1517, Leonardo showed a visitor a portrait of Lisa del Giocondo, the wife of a ...

We invited teenagers to write miniature memoirs about meaningful moments in their lives. Read the 20 winning stories. By The Learning Network This year’s Super Bowl was likely the biggest ...

Free body diagrams do not need to be drawn to scale but it can sometimes be useful if they are. It is important to label each arrow to show the magnitude of the force it represents. The type of ...