Royalty-Free Science Photos, dominant color: gray, sorted by aesthetic score
- 2592x4235 Public Domain
- 4608x3072 Public Domain
- 4000x2400 Public Domain
- 3036x2024 Public Domain
- 3000x2000 Public Domain
- 3300x2282 Public Domain
- 1920x1920 Public Domain
- 5000x2830 Public Domain
- 5000x2830 Public Domain
- 5992x3808 Public Domain
- 4000x2667 Public Domain
- 3424x2739 Public Domain
- 4608x3072 Public Domain
- 6480x4320 Public Domain
- 5000x2300 Public Domain
- 3000x1700 Public Domain
- 2237x2153 Public Domain
- 4000x3000 Public Domain
- 3000x2000 Public Domain
- 2592x3456 Public Domain
- 2000x1222 Public Domain
- 2000x1227 Public Domain
- 4400x3388 Public Domain
- 3702x2478 Public Domain
- 5200x3000 Public Domain
- 2100x1500 Public Domain
- 4924x4924 Public Domain
- 3648x5472 Public Domain
- 5472x3648 Public Domain
- 5025x3350 Public Domain