Two podcast episodes over the last month have opened my eyes to things I didn’t know.

First, that cabbage, broccoli, cauliflower, kale, Brussels sprouts, collard greens, savoy, and kohlrabi are all variants of the same species of plant, something revealed in an episode of the Surprisingly Awesome podcast.

Second, via an episode of the 99% Invisible podcast, that expiry dates on things like milk and yoghurt, have nothing at all to do with food safety (although it’s important to disclose that my partner Catherine insists that she’s been telling me this for years, and I haven’t believed her).