This week's retweets

One of the things about Twitter that I'm grateful for is how much good stuff it can put before you. This can be an overwhelming experience, similar for me to visiting a well-stocked charity bookshop (each to their own), but at least it's easy to share the goodness by retweeting. For those who stay out of the maddening cave, here's what I've liked this week:

All sources can be found on my Twitter account. I might use shorter links in the future.