Red-Black Tree Earrings with Don Knuth

“Are those earrings red-black trees? Can I get a photo of them? I’d like to send it to Bob.” [who invented them 😅] And that’s how I got this selfie with Don Knuth.

A woman wearing red-and-black tree earrings poses for a selfie with computer scientist Donald Knuth. She jokes that she wanted to send a photo of the earrings to Bob, who invented red-black trees, but instead ended up meeting Knuth, creating a playful computer-science pun.

• @right_wing_dev_squads / 15059 2026-10-14