Radioactive Iron Rain!

The video explores atmospheric science, focusing on gravity waves in Pluto's atmosphere, distinct from gravitational waves. It explains how gravity waves form and their presence on Earth and Mars. The video also discusses radioactive elements from supernovae found in Earth's crust, suggesting past supernovae may have influenced Earth's climate. Recent findings indicate Iron 60 continues to rain down on Earth, though in negligible amounts. The episode concludes with acknowledgments to SciShow patrons and mentions a project on interstellar travel.

What distinguishes gravity waves from gravitational waves?

• Gravity waves are caused by stars, while gravitational waves are caused by planets.

• Gravity waves are only found on Earth, while gravitational waves are found in space.

• Gravity waves are ripples in fluids, while gravitational waves are ripples in space-time.

• Gravity waves occur in space-time, while gravitational waves occur in fluids.

Where have gravity waves been observed before being detected in Pluto's atmosphere?

• Earth and Venus

• Mars and Jupiter

• Earth and Mars

• Venus and Jupiter

What is Iron 60, and how is it related to supernovae?

• A non-radioactive element found in Earth's oceans, related to supernovae.

• A radioactive element synthesized in stars, found in Earth's crust due to supernovae.

• A stable element found in Earth's crust, unrelated to supernovae.

• A common element in Earth's atmosphere, unrelated to supernovae.

How might supernovae have influenced Earth's climate in the past?

• By causing massive earthquakes.

• By bombarding Earth with dust and gamma rays.

• By altering Earth's magnetic field.

• By increasing Earth's temperature significantly.

What recent discovery was made about Iron 60 and its presence on Earth?

• It has been raining down at a rate of 1 nucleus per year for 17 years.

• It has been linked to recent volcanic activity.

• It has been found in large quantities in Earth's atmosphere.

• It has been discovered to be harmless to humans.