File name: noaaphotolib-flickr-cc-620.jpg Original Resolution: 620 × 349 File Size: 93 KB (MIME Type: image/jpeg) Date Published: October 12, 2021 Download file View image caption A frozen methane clathrate serves as a small apartment complex for methane ice worms. Thawing clathrates produce a potent greenhouse gas. Photo by Flickr user NOAA Photo Library.