Life on Earth likely began approximately 3.7 billion years ago, based on the earliest evidence we have.
Evidence for Early Life
Microscopic Organisms
- The earliest life forms known were microscopic organisms, or microbes.
- These microbes left behind detectable signals in ancient rocks.
Rock Evidence
- Rocks dating back about 3.7 billion years show evidence of these early life forms.
- This evidence indicates that life already existed on Earth at that time.
Timeline
| Event | Approximate Time |
|---|---|
| Earliest Evidence of Life | 3.7 billion years ago |
