Summary:

- A new study suggests that comets brought water to Earth billions of years ago, contributing to the formation of the planet's oceans.
- The study analyzed the chemical composition of water in comets and found that it matches the water found in Earth's oceans, indicating that comets were a significant source of the planet's water.
- This finding provides further evidence that comets played a crucial role in shaping the early Earth and making it habitable for life.