All the characters are fictional

The film's central premise, the importance of fire and the difficulty of maintaining it, is likely accurate. Fire was crucial for early hominids, and losing it would have been a major setback.

The film shows conflict between different hominid groups. It's likely that competition for resources existed between different groups, though the specifics of these conflicts are unknown.

The specific journey undertaken by the characters in search of fire is a fictional narrative. While the importance of fire is real, the story itself is a work of fiction.

The film depicts the eventual discovery of a method for creating fire. While it is possible that different groups developed varying techniques, the film's particular portrayal of this discovery is speculative. Current archaeological evidence does not support this.

The film attempts to depict early hominid life, but our understanding of this period is constantly evolving. While some aspects, like the challenges of survival, are likely accurate, others are speculative and reflect the knowledge available at the time the film was made.

The film depicts different hominid species coexisting. This is consistent with current scientific understanding, as various hominid species did exist simultaneously.

The film avoids giving the hominids complex language, portraying them communicating primarily through gestures and basic vocalizations. This is a reasonable assumption, as complex language likely developed later in human evolution.

The film shows the hominids using simple tools, which is consistent with archaeological evidence. Early hominids did use tools made of stone and other materials.

The film portrays some social structures within the hominid groups. While it's likely they had some form of social organization, the specifics depicted are speculative.

The film depicts a prehistoric environment. While the general setting is plausible, the specific flora and fauna may not be entirely accurate for the time period and locations depicted.

The film shows the hominids using body paint and adornments. While the specific designs are speculative, it's plausible that early hominids used such practices for ritualistic or social purposes.

The film includes scenes that suggest cannibalism. While cannibalism has occurred in some human populations, whether it was practiced by these specific hominid groups and to what extent is debated.

The Neanderthals are depicted with certain physical characteristics. Our understanding of Neanderthal appearance continues to evolve, thus some of the features shown might not be entirely accurate to the most recent scientific understanding.

The film portrays the hominids as having a certain level of intelligence. While they are shown as capable of learning and problem-solving, the precise level of their cognitive abilities is a matter of ongoing scientific research.