PlanetShine is an email newsletter (usually a 5 minute read) with the most worthwhile reading I've found. It's a mix of thought-provoking fiction and nonfiction, science and technology, genre art, and occasional original short fiction and essays.
PlanetShine is also available as a podcast.
Read past issues.
If you subscribe now, you will also get access to a short story that is only available to PlanetShine members.
I won't give, loan, or sell your email address to anyone. Every message contains an unsubscribe link, and you can remove yourself at any time.