Quiz · Searching for Life Beyond Earth

Question 1What is the talk mainly about in this passage?

How scientists search for life beyond Earth How planets are formed around stars Why the night sky is completely silent The building of giant radio telescopes

Question 2What have scientists discovered during the past thirty years?

Certain proof of life on other planets Messages from intelligent civilisations Thousands of planets circling far distant stars A second Earth exactly like our own

Question 3What might certain unusual gases in a planet's light be a sign of?

A coming storm on the planet Simple living things The planet moving closer to its star A new telescope error