DNA

How Kary Mullis's 1983 idea became the polymerase chain reaction, how the three-step cycle works, and why it underpins diagnostics, forensics, and research

How Frederick Sanger's chain-termination method turned the order of DNA bases into something a laboratory could read, and why it still matters.

A gene isn't a single thing in your body. It's a stretch of DNA that cells read to make a protein or functional RNA, switched on and off by cell type, timing, and signals. Here's how genes really work.

Cancer isn't one disease — it's hundreds, all sharing one root cause: cells that lose control of how they divide. Here's what triggers it, how it spreads, and what we can actually do about it.

Forget the headlines about designer babies for a minute. Here's what actually happens at the molecular level when Cas9 finds, unzips, and cuts a strand of DNA.

DNA is the instruction manual for every living thing. Here's how its four-letter code builds proteins, copies itself, and passes traits from parent to child — explained in plain language.