Ijeoma Uchegbu, "Chain Reaction: How Chemistry Shapes Us and Our World" (HarperCollins, 2026)

About this episode

By one of the world's leading chemists, an entertaining and revealing tour of the chemical bonds that shape our everyday lives and provide the infrastructure for our chaotic world.  We all have a relationship with chemistry. Bonds between molecules, forged and broken in the blink of an eye, underpin everything from the food we eat and the clothes we wear to the ways we treat illnesses and construct our homes. It’s a relationship we nurture, whether we know it or not, and for leading chemist Ijeoma Uchegbu, it was serious from the beginning. In Chain Reaction: How Chemistry Shapes Us and Our World (HarperCollins, 2026) Uchegbu shows us the world through a chemist’s eyes, revealing the intricate science we take for granted: how our body’s most fundamental chemical structure, our DNA, is estimated to be two meters long, resting tightly within each of our cells; how egg yolks are held together by weak chemical bonds that make them primed for emulsifying our salad dressings; and how the chemical makeup of PFAs, or “forever chemicals,” makes them so good at sticking around. Along the way, we travel from Uchegbu’s home in London to Nigeria, where cooking experiments go awry in her f