Hank Green discusses recent scientific discoveries about amino acids, the building blocks of life, and their potential to form anywhere in the solar system. This suggests that life could exist beyond Earth. The video also covers NASA's findings on Mars, confirming the absence of methane, a potential life indicator. Despite this, the possibility of unknown life forms remains. The episode concludes with a call for viewer interaction.

What did scientists discover about amino acids in the solar system?

• They can occur almost anywhere in the solar system.

• They can only form on Earth.

• They are not essential for life.

• They are only found on Mars.

What was the purpose of firing projectiles at an icy surface in the experiment?

• To simulate a volcanic eruption.

• To create a new type of ice.

• To test the strength of ice.

• To mimic a comet hitting an icy planet.

What is the significance of amino acids forming from comet impacts?

• It proves life exists on Mars.

• It suggests life could form anywhere in the solar system.

• It shows amino acids are not important.

• It indicates water is not necessary for life.

Why is the formation of amino acids considered a complex step?

• Because they are the final step in forming life.

• Because they are simple molecules.

• Because they are not related to proteins.

• Because they are a step up from water and carbon dioxide.

Which icy worlds are mentioned as potential sites for life?

• Mars and Venus

• Europa and Enceladus

• Jupiter and Saturn

• Mercury and Pluto

What did NASA confirm about methane on Mars?

• Methane is only found in the soil.

• Methane is abundant in the atmosphere.

• There is no methane present.

• There is a large amount of methane.

What was the initial confusion about methane detection on Mars?

• Methane was detected in large quantities.

• Methane was found in the Martian core.

• Methane was thought to be from Earth bacteria.

• Methane was never detected.

What instrument did NASA use to measure methane on Mars?

• A high-speed camera

• A seismic sensor

• A tunable laser spectrometer

• A thermal imaging device

What does the absence of methane on Mars suggest?

• Mars is full of life.

• Mars has a thick atmosphere.

• There is no life as we know it on Mars.

• Methane is not important for life.

What is the concluding message of the video?

• Life on Mars is confirmed.

• Mars is the only planet with potential life.

• Exploring new forms of life in the solar system is exciting.

• There is no hope for life beyond Earth.