Hey Bill Nye, "How Do We Know the Earth Is Round?" #TuesdaysWithBill | Big Think

TL;DR

Bill Nye provides evidence to prove that the Earth is round, including observations from the seashore, pictures from space, and the curved shadow during lunar eclipses.

Transcript

Matt Harden: Hey Bill, can you prove beyond a reasonable doubt that the earth is a sphere and not flat? I have a lot of Facebook friends who say that it's an act. Thank you. Bill Nye: Is the earth flat or round? It's round. Now, let's see, how do we go about proving that? Go to the seashore. Go to the seashore and figure out why you can't, if you l... Read More

Key Insights

• 📍 Observing distant places inaccessible from certain locations serves as evidence for the Earth's round shape.
• 👾 Pictures taken from space provide visual proof of the Earth's spherical nature, with the enormous costs involved making forgery unlikely.
• 💬 The curved shadow during lunar eclipses, observed by the ancient Greeks, supports the notion of the Earth being a ball.
• ✋ Navigation depends on understanding the Earth's shape and size accurately, influencing how far one can see from a higher position.
• 🙂 The Earth's slight oblate shape, or being slightly stretched due to its spin, is a subject of analysis and study.
• 🌐 Understanding the Earth's round shape with precision has transformed various aspects of modern life, including travel and global trade.
• 💠 Bill Nye encourages individuals to educate themselves and study navigation as a means to further comprehend the Earth's shape and size.

Questions & Answers

Q: How can we prove that the Earth is round?

Bill Nye suggests observing why distant places cannot be seen from specific locations, climbing a tower or hill to see farther, and studying pictures of the Earth from space. These pieces of evidence support the round shape of the Earth.

Q: Are the pictures of the Earth from space real or doctored?

According to Bill Nye, the pictures of the Earth taken from space are not faked. The immense paperwork and expense required to send objects and individuals into space make it highly unlikely that the pictures are fabricated.

Q: What role does navigation play in proving the Earth is round?

Nye explains that navigation relies on understanding the Earth's shape and size accurately. The higher one stands above the sea surface, the farther they can see, supporting the idea that the Earth is a sphere.

Q: When was it proven that the Earth is round?

Although the ancient Greeks had noticed the curved shadow during lunar eclipses, the Earth's spherical shape was widely known and published in the 16th century. Copernicus is suggested as one of the individuals who contributed to this discovery.

Summary & Key Takeaways

• Bill Nye emphasizes that the Earth is round, not flat, by highlighting the inability to see distant places from specific locations, the evidence provided by pictures from space, and the curved shadow during lunar eclipses.

• He suggests looking at the world from different perspectives, such as climbing a tower or a hill, to observe the Earth's curvature.

• Nye encourages further research into navigation, as it demonstrates the importance of understanding the Earth's shape and size accurately.