| Hashtag | Frequency in past 7 days |
| covid19 | ███████████████████ |
| scicomm | ██████████ |
| perseverance | ███████ |
| countdowntomars | ██████ |
| mars | █████ |
| science | █████ |
| perseverancerover | ████ |
| climate | ████ |
| inspiration4 | ███ |
| journalism | ███ |
| climatecrisis | ███ |
| covid | ██ |
| coronavirus | ██ |
| climatechange | ██ |
| mars2021 | ██ |
| sciart | ██ |
| mars2020 | ██ |
| moderna | ██ |
| texasblackout | ██ |
| thylacine | ██ |