Could humans live in underwater cities? 6 Minute English

TL;DR

Exploring the feasibility and challenges of underwater living.

Transcript

Hello. This is 6 Minute English from BBC Learning English. I'm Neil. And I'm Rob. From the ancient Roman sea god, Neptune, to myths of mermaids, to modern Hollywood films like Finding Nemo, people throughout history have been fascinated by the idea of living underwater. In this programme, we'll be hearing about projects to create liveable underwate... Read More

Key Insights

• The concept of living underwater has fascinated humans for centuries, inspired by myths and popular culture.
• Ocean Spiral is an ambitious design by Shimizu Corporation for an underwater city, connecting sea surface to deep sea.
• The project aims to address global issues by utilizing deep sea resources, but remains in the planning stage due to high costs.
• Living underwater presents physiological challenges, such as changes in voice and decompression sickness caused by increased atmospheric pressure.
• The longest recorded time spent living underwater is 73 days, highlighting current limitations in underwater habitation.
• Decompression sickness, or the bends, is a significant risk for divers due to nitrogen bubbles forming in the muscles when surfacing too quickly.
• Despite technological advances, underwater living remains largely in the realm of science fiction due to numerous engineering and physiological challenges.
• The search for natural resources is driving interest in underwater exploration, but practical implementation faces significant hurdles.

Questions & Answers

Q: What is Ocean Spiral and who designed it?

Ocean Spiral is a proposed underwater city designed by the Japanese Shimizu Corporation. The concept involves a large transparent globe attached to the seabed, with a central tower providing space for homes and offices. It aims to utilize deep sea resources to address global issues.

Q: What are the physiological challenges of living underwater?

Living underwater affects the human body in several ways, including changes in voice due to denser air and the risk of decompression sickness, or the bends. This occurs when nitrogen bubbles form in the muscles as divers return to the surface too quickly, causing serious medical issues.

Q: How long has the longest underwater habitation lasted?

The longest recorded time spent living underwater is 73 days, achieved by Roger Garcia, an ex-military diver and head of The Aquarius, the world's only underwater research station. This highlights the current limitations of extended underwater habitation.

Q: What are the main goals of the Ocean Spiral project?

The Ocean Spiral project aims to address global issues related to food, energy, and natural resources by creating a liveable underwater environment. By connecting the sea surface to the deep sea, the project seeks to harness the capabilities of the deep sea for sustainable development.

Q: What are the engineering challenges of building underwater cities?

Building underwater cities presents significant engineering challenges, including the need to withstand high atmospheric pressure, ensure structural integrity, and provide adequate living conditions for inhabitants. Additionally, the high cost of such projects, estimated at over 26 billion dollars, poses a major hurdle.

Q: Why is decompression sickness a risk for underwater living?

Decompression sickness, or the bends, is a risk for underwater living because it occurs when divers ascend too quickly, causing nitrogen bubbles to form in the muscles. This is due to the increased atmospheric pressure underwater, which requires careful management during ascent to avoid medical complications.

Q: What inspired the idea of living underwater?

The idea of living underwater has been inspired by ancient myths, such as the Roman sea god Neptune, and modern cultural references, including films like Finding Nemo. These stories have fueled human imagination and interest in exploring the possibility of underwater habitation.

Q: What is the current status of the Ocean Spiral project?

The Ocean Spiral project is currently in the planning stages, with no part of the project yet built. The high estimated cost and significant engineering challenges have delayed its implementation, making it a concept rather than a reality at this time.

Summary & Key Takeaways

• The idea of living underwater has captured human imagination, from ancient myths to modern films. This discussion explores current projects aiming to create habitable underwater environments and the challenges they face, such as physiological effects on the human body and engineering difficulties.

• Ocean Spiral, designed by Shimizu Corporation, is a proposed underwater city that seeks to address global resource issues by connecting the sea surface to the deep sea. However, the project is still in planning due to its high cost and technological challenges.

• Living underwater poses significant physiological challenges, including decompression sickness and changes in voice due to increased atmospheric pressure. Despite these difficulties, the search for underwater resources continues, although practical implementation remains elusive.