Term
When during the last geoyear do the following events occur?
- Hominids break off from primate line (and where did it happen?)
- First use of fire (and who was it)
- The first homo sapiens
- First humans in the Americas
- First fortified city
- Christopher Columus' voyage to Americas
- Galileo's discoveries
- The age of the average freshman student
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Definition
- Hominids break off from primate line (and where did it happen?): December 31st 4:40am (East Africa)
- First use of fire (and who was it): 8:20pm (Homo-Erectus)
- The first homo sapiens: 11:36pm (24 minutes before midnight of new year)
- First humans in the Americas: 90 seconds before midnight
- First fortified city: 1 minute before midnight
- Christopher Columus' voyage to Americas: 3 seconds before midnight
- Galileo's discoveries: 2 seconds before midnight
- The age of the average freshman student: 0.14 seconds
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Term
| What is the current human population (to the nearest billion)? |
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Definition
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Term
| How long did it take to go from 1 billion people to the current human population, in real time and in geoyear time? |
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Definition
207 years
1.4 seconds ago |
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Term
| What are the five main causes of the modern extinction event? What was the largest before 1800, and what has been the largest since? |
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Definition
Habitat loss (largest since)
Invasive species (largest before)
Pollution
Population
Overhunting |
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Term
| What is the most effective method of population growth control? |
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Definition
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