<p>Imagine you pick up two identical-looking pills—one saves lives, the other is toxic. Welcome to the world of chirality, where molecular handedness determines everything. This episode explores how some molecules exist in left- and right-handed versions, why life only uses one type, and how a single flip can be the difference between medicine and poison.</p><p><br></p><p>We uncover the tragic story of thalidomide, a drug disaster caused by chirality, and investigate why smell, taste, and even DNA depend on molecular symmetry.</p><p><br></p><p>Could alien life use the opposite handedness of molecules? And if so, would they be able to eat our food? It’s a world of molecular doppelgängers—where the smallest changes have the biggest consequences.</p>