In providing a long-term, coordinated program for habitat restoration and conservation, the Habitat Plan aims to enhance the viability of threatened and endangered species throughout the Santa Clara Valley. The Habitat Agency implements the Habitat Plan and reports compliance to the Wildlife Agencies.
(b). Scientists believe the Earth began its life about 4.6 billion years ago. The Earth formed as cosmic dust lumped together to form larger and larger particles until 150 million years had passed. At about 4.4 billion years, the young Earth had a mass similar to the mass it has today.
What we've learned is that the Earth cooled much more quickly that people had thought, Valley said. The surface formed a crust much more quickly than people thought.. A brief history of E a rth. Our planet is thought to be about 4.5 billion years old, but the oldest fossils are about 3.5 billion years old. That doesn't necessarily mean that no life existed before that time, but no direct evidence has been found yet.