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1. To what object does the author refer when writing that the object represents a person trying to announce their presence to the world?

A human handprint.

2. How long ago did the Big Bang take place?

13.5 billion years ago.

3. Biologists classify organisms into what?

Species.

4. What does Harari describe as "insignificant animals with no more impact on their environment"?

Prehistoric humans.

5. Animals are said to belong to the same species if they are able to take what action?

They are physically able to mate.

6. Species that have evolved from a common ancestor are grouped together under what heading?

Genus.

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