This week, explore a medieval manuscript, spy an underwater volcano ready to erupt off the US West Coast, encounter T. rex’s ancestor, and more.

Where have all the torsos gone? The photorealistic “clinch cover,” featuring lovers mid-embrace, is a critically endangered species. Fabio? Hasn’t been seen around these parts in years. But he hasn’t ...

If you look inside the front and back of the nearest hardcover book, you’ll probably see colored or decorative endpapers ...