There's now clear evidence that just ~1 degree C of warming has already impacted every aspect of life on Earth, with increasingly unpredictable consequences for humans.
"We now know for sure that dinosaurs and dinosaur precursors lived alongside one another and that the rise of dinosaurs was more gradual, not a fast overtaking of other animals of the time."
Researchers studied ancient rock formations from South Africa's Barberton greenstone belt, with some of the oldest rocks on Earth, dating back 3.5 billion years.
Researchers studied storm development from the Pliocene era, roughly three million years ago, because it was the last time Earth had as much carbon dioxide as it does now.
Scientists have begun to account for the topsy-turvy carbon cycle of the Colorado River delta -- once a massive green estuary of grassland, marshes and cottonwood, now desiccated dead land.