Rather surprisingly, this new hypothesis of our climate would even allow for the sun to be hotter during an ice age! It would account for the megafauna which is evidenced by their numerous fossils which would be due to an abundance of megaflora, w.r.t more sunlight. There's even evidence that tropical monkeys were also of mega proportions when compared with their modern counterparts:
There's a cave in Brazil where remains of a much larger than normal species of monkey were found. How did they grow so big? Were the trees twice as big, with twice size fruit? That's the only possible scenario isn't it?? Webpage title: Discoveries Under Brazil.
"The skull of Caipora bambuiorum, one of the two complete primate skeletons recovered from Toca da Boa Vista. It closely resembles the living spider monkey, but is more than twice the size, suggesting that South American monkeys participated fully in the mega-faunal phenomenon of the last Ice Age.
Frontal view of the crania of Protopithecus (left) and Caipora (right), both from Toca da Boa Vista. They resemble living South American monkeys that inhabit the top levels of the tropical forest canopy, but they were significantly larger than any living species. Further exploration of Toca da Boa Vista hopefully will yield more primate species that also were quite large compared to modern monkeys."