Many of the observations and probes discovered significant matters such as water, ribose phosphorus, and formaldehyde on comets. Most likely, life seems to be brought by these visitors.
Keywords: NASA, ESA, Comet, Stardust, Deep Impact, Tianwen-1, Giotto, Rosetta

*Follow: Free Astronomy & Science: https://www.freeastroscience.com
**Patreon: If you ever feel like supporting my project: https://www.patreon.com/ScienceWeSpeak
SOCIAL MEDIA:

Instagram: https://www.instagram.com/sciencewespeak/
Facebook: https://www.facebook.com/ScienceWeSpeak
Telegram: https://t.me/sciencewespeak