Thank you, whoever you are, for so far 106 pageviews today despite no new posts on this blog today until this one. Laid up with a toothache, I have:
continued with other reading;
reread earlier posts;
copied three of them onto the Poul Anderson's Cosmic Environments blog.
I will shortly watch Doctor Who because I so rarely do. The new series is disappointing regular fans so might possibly contain something of interest and might lead to yet more, unfavorable, comparisons with Poul Anderson's time travel canon.