
Penicillin Wasn’t Alexander Fleming’s First Major Discovery
It was lysozyme, an enzyme that attacks the cell walls of bacteria—and just as with the celebrated antibiotic, he found it through pure serendipity
Claudia Kalb is a freelance journalist. Her latest book is Spark: How Genius Ignites, From Child Prodigies to Late Bloomers.

Penicillin Wasn’t Alexander Fleming’s First Major Discovery
It was lysozyme, an enzyme that attacks the cell walls of bacteria—and just as with the celebrated antibiotic, he found it through pure serendipity

Evolution and Angst: Charles Darwin Was a Worrier [Excerpt]
The intrepid explorer and scientific maverick appears to have suffered from anxiety and panic attacks

Fetal Armor: How the Placenta Shapes Brain Development
Scientists are finding that the placenta is far more than a passive filter