Hackernews posts about Roger Waters

1. NASA rover discovers liquid water 'ripples' carved into Mars rock (www.livescience.com)
   79 points by Brajeshwar about 1 year ago | 27 comments
2. Perseverance rover reveals multiple habitable water periods in Mars' Crater (indianexpress.com)
   2 points by ashishgupta2209 5 months ago | discuss