biology

What regulary hit the earth for the first 600 million years of existence? What do scientists call this period of time?
- Aseroids, and meteors hit the earth.What do scientists called this period of time ? I need help answer this question please. If the first question is right ?

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asked by joy
  1. Here are some links to try:

    http://search.yahoo.com/search?fr=mcafee&p=What+regulatory+hit+the+earth+for+the+first+600+million+years+of+existence

    And for the 2nd part of your post, here:

    http://search.yahoo.com/search?fr=mcafee&p=what+do+scientists+call+the+time+priod+when+asteroids+%26+meteors+hit+the+earth

    Sra

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