The Martian Obelisk
ShortStory 5,908 words Recommended by 10 award/anthology sources
As civilization is dying on Earth, a woman building a monument on Mars by remote control gets a message from a Mars colony long thought to be dead.
Content warnings 4
child-deathdeath-of-a-loved-oneillness-and-pandemicwar
Quasar links out; the story lives on Tor.com, where the author gets the click.