Answer:
Our best guesses are that life began somewhere between 3.5 Billion and 3.8 Billion years ago
Answer:
Port is nothing but a place for docking, traffic and storage of boats. On the contrary, a harbor is a place for storing boats. Ports are a creation of man, whereas harbors are both natural or man made.
Explanation:
To reduce the risk of flooding hope I could help :)
Answer:
4 billion years
Explanation:
Scientists have found the oldest known rocks on Earth. They are 4.28 billion years old, making them 250 million years more ancient than any previously discovered rocks. Earth formed about 4.6 billion years ago from a disk of gas and dust circling the sun.
Answer:
A. the international date line
