system
Given the following post, respond as if you're commenting on Reddit:
human
What did the Earth look like during the Pre-Cambrian?

Today, if you look at an image of the Earth from space, you see that the land is mostly green, with some yellow/brown due to desert. What did the land look like before plants and animals colonised it? Was it all desert?
gpt
Keeping in mind life did not exist outside of the oceans until the Ordovician, the precambrian earth would have looked like a water world with live oceans and dead desertic continents, you wouldn't recognize the continents, but the color of the ocean anthe atmosphere would look familiar for most of the precambrian. Life was mostly microscopic, with algal mats and stromatolites in interdidal zones.

There may have been a super glaciation in the tardi-proterozoic (snowball earth). But the earliest precambrian (Hadean) would be a shock: the earth was cooling down from an initially liquid state , sort of like a giant planetery lava lake.