On: Fresh water on Earth emerged 500M years earlier th...

[sameerds]

I did mean the same thing, although I ended up using really loose informal English. Should our intervals be tighter on the new finding?

[setgree → sameerds]

not for me. I don't know much about the emergence of freshwater, but if I learn at some point that humans were in the Americas 50,000 years ago --- perhaps they used rudimentary rafts? -- I will not be shocked.