Rewrite the underlined words in these sentences using expressions in the vocabulary section.

1. The worst possible prediction is that we will destroy the world with nuclear weapons.
2. Travelling to other planets for scientific exploration will become normal in the coming centuries.
3. He belongs to a team of scientists who are trying to improve our understanding of the index of all the genes in a human being.
4. Governments need to do things that will have a great impact to save the planet.
5. Many people see in their imagination a world in which the poor simply get poorer.