[tuatoru]

> with humans weighing in at 0.06 gigatons

At that time, perhaps. If average human mass is 30 kg, with 8 billion of us, we mass about 0.24 Gt.

[froj]

In TFA they count 7.6B humans, but the mass is only the "dry-weight of carbon". So I guess the average person only contains about 8kg of carbon.

[rbanffy]

“Ugly bags of mostly water” is how an alien in Star Trek once described us.

[gumby]

Not merely “water”: it’s the very ocean in my veins.