Earth's craters are enduring testaments to direct asteroid hits. And though millions—in some cases billions—of years of erosion have made it difficult to determine the exact size of the meteorites, there is a general scientific consensus around the world's largest craters, which mark the largest asteroid impacts.

Here are the ten biggest known:

1. Vredefort Crater

Asteroid impact date: Estimated 2 billion years ago

Location: Free State, South Africa

Specs: Also known as the Vredefort Dome, the Vredefort crater has an estimated radius of 118 miles (190 kilometers), making it the world's largest known impact structure.

2. Sudbury Basin

Asteroid impact date: Estimated 1.8 billion years ago

Location: Ontario, Canada

Specs: The Sudbury Basin is considered one of largest impact structures on Earth, with an estimated diameter of 81 miles (130 kilometers).

3. Acraman Crater

Asteroid impact date: Estimated 580 million years ago

Location: South Australia, Australia

Specs: impact structure has an estimated diameter of 56 miles (90 kilometers).

4. Woodleigh Crater

Asteroid impact date: Estimated 364 million years ago

Location: Western Australia, Australia

Specs: Reports on its diameter vary from 25 to 75 miles (40 to 120 kilometers).


5. Manicouagan Crater

Asteroid impact date: Estimated 215 million years ago

Location: Quebec, Canada

Specs: This impact crater formed what is now Lake Manicouagan. Even with erosion, it's considered one of the largest and best-preserved craters on Earth, with an estimated diameter of 62 miles (100 kilometers).

6. Morokweng Crater

Asteroid impact date: Estimated 145 million years ago

Location: North West, South Africa

7. Kara Crater

Asteroid impact date: Estimated 70.3 million years ago

Location: Nenetsia, Russia

8. Chicxulub Crater

Asteroid impact date: Estimated 65 million years ago

Location: Yucatán, Mexico

Specs: Estimates of its actual diameter range from 106 to a whooping 186 miles (170 to 300 kilometers), which if proved right could mean it's the biggest.

9. Popigai Crater

Asteroid impact date: Estimated 35.7 million years ago

Location: Siberia, Russia

Specs: These diamonds have been referred to as "impact diamonds."

10. Chesapeake Bay Crater

Asteroid impact date: Estimated 35 million years ago

Location: Virginia, United States

Specs: Estimates suggest this crater is 53 miles (85 kilometers) wide.