The main story is fictional

Saber-toothed cats hunted mammoths

Saber-toothed cats did indeed hunt large prey like mammoths. They were apex predators of the time and mammoths were a part of their diet.

Glaciers caused mass migration

Glaciers did cause significant environmental changes, forcing animals to migrate in search of food and warmer climates. This is a well-established fact.

Ground sloths were giant

Megatherium, a giant ground sloth, existed during the Pleistocene epoch. They were indeed much larger than modern sloths.

Dodos existed in the Ice Age

Dodos were not around during the Ice Age. They evolved much later and went extinct in the 17th century.

Scrat's pursuit of an acorn

The specific behavior of a squirrel obsessed with a single acorn to the point of causing global events is a fictionalized element for comedic effect. It's not based on any real animal behavior.

The existence of a 'lost world'

The film implies a sort of isolated 'lost world' where these Ice Age animals lived. In reality, these animals existed across vast regions and interacted with diverse ecosystems.

The rapid pace of the Ice Age

The film compresses the timeline of the Ice Age significantly. The actual Ice Age spanned thousands of years with gradual environmental changes, not the rapid events shown in the film.

Diego's personality change

While the rapid change in Diego's personality for plot purposes is exaggerated, animals can adapt and modify their behavior, especially when survival is threatened.

Sid's clumsiness

While exaggerated for comic relief, sloths are known for their slow movements and lack of coordination. Sid's clumsiness is based on this trait, although greatly amplified.

Manny's isolation

Mammoths were social animals, though solitary individuals could exist. Manny's initial isolation in the film serves the narrative, but it's not entirely historically inaccurate to have a lone mammoth.

The formation of Pangaea

Pangaea existed hundreds of millions of years before the Ice Age. The continents were already in their current (more or less) form during the Pleistocene epoch.

The extreme weather conditions

The Ice Age was characterized by periods of extreme cold and glacial expansion. The harsh weather depicted in the film aligns with the general understanding of this period.

The diversity of species

The film features various Ice Age animals that did exist. While some are exaggerated or placed in the same location for dramatic effect, the general diversity of species is accurate.