grown weary up
The logic of time travel has one major consequence that has so far been explained with a fairly good science fiction trick.
If time travel has been (will have been) invented in the future, why haven’t any time travellers been back to visit us yet?
Untargeting: how ads are making websites into narcissistic exercises in futility
There’s a problem with targeted advertising that is very clear, but not obvious: reflection of the user’s interests and not the content creator’s.