ancestors

In museums, there are dioramas with cave people hunting mammoths with spears and movies are filled with examples of aggressive ancestors.

Moreover, whales embody immense cultural value to many peoples, often as protectors of community and the reincarnated spirits of deceased ancestors.

Exactly which biological changes allowed human ancestors to meet the very high needs for energy as they evolved larger brains has remained unclear.

These hardy varieties are cold-adapted and are the ancestors for commercially important maize grown around the world.

One example of this is found in mixed forests, which contain coniferous evergreen tree species whose ancestors lived over 300 million years ago.