Mastodon FeedJan 29, 2023, 7:24 PM Reblogged by jeffsonstein ("Jeff Sonstein"): Sheril ("Sheril Kirshenbaum") wrote: Attachments: Marie Tharp with an undersea map at her desk. Rolled sonar profiles of the ocean floor are on the shelf behind her. Credit: Lamont-Doherty Earth Observatory and the estate of Marie Tharp