* “My writing day: Hilary Mantel.”

* How cheap does solar power need to get before it takes over the world?

* The Wirecutter tests the (many) online mattress companies and likes Leesa the best.

* How university students infantilise themselves.

* “So You’re Getting a Ph.D.: Welcome to the worst job market in America.” Which readers of this blog should already know.

* More than 1,000 world leaders say the obvious: the drug “war” has been a disaster. Daniel Okrent’s Last Call is good on this.

* “The alt-right is more than warmed-over white supremacy. It’s that, but way way weirder.” A much better and weirder piece than you’re expecting.