Curiosity Weekly – Episode Summary
Episode: Life Under the Sea, No Singing Crabs
Host: Dr. Samantha Yammine
Guest: Dr. Dawn Kernagis, Aquanaut and Neuroscientist
Date: March 4, 2026

Episode Overview

This episode of Curiosity Weekly dives deep—literally—into the world of underwater exploration and human resilience in extreme environments. Dr. Samantha Yammine welcomes Dr. Dawn Kernagis, an aquanaut and neuroscientist, to discuss the realities of living beneath the waves, the unique psychological and physiological challenges this presents, and how NASA simulates space missions in Earth's aquatic realms. The episode also spotlights NASA’s Artemis missions to the moon and wraps up with a segment on an innovative approach to measuring pain through artificial intelligence.

Key Discussion Points & Insights

Artemis: Back to the Moon and New Frontiers

[01:44 – 06:46]

• Historical Context: Audio from the Apollo 17 moon mission vividly sets the stage for discussing past lunar exploration (02:32).
• Artemis II Preview: Artemis II aims to bring humans back to the moon for the first time in over 50 years, orbiting further in space than any human mission before (02:51).
  • Diverse crew: First Canadian, first woman, and first Black astronaut to orbit the moon.
  • Missions: Artemis III (in ~2 years) will be the first human exploration of the lunar south pole.
  • Long-term vision: Habitat “Gateway” planned as a lunar space station to enable longer, deeper exploration.
• Why Explore? Yammine highlights scientific curiosity, international collaboration, spin-off technologies, and inspiration for future generations as key motivators (05:00).
  • Quote: “If Apollo was one small step for man, I think of Artemis as giant steps for humanity in space and here on earth.” (05:45, Dr. Samantha Yammine)

Life as an Aquanaut: Interview with Dr. Dawn Kernagis

[08:39 – 26:48]

The NEEMO 21 Mission Experience

• Mission Overview: NASA’s NEEMO (NASA Extreme Environment Mission Operations) 21 sent researchers 62 feet underwater for 16 days to simulate space missions and study coral reef restoration (09:27).
• Immersion & Research: Extended time underwater allows researchers to observe entire daily and nightly cycles on the reef—something impossible on a typical dive.
  • Quote: “You really just become a part of that ecosystem at the bottom of the ocean.” (09:46, Dr. Dawn Kernagis)

Life in the Habitat

[12:44]

• Living Quarters: Compared to a large Airstream trailer; six small windows with views of marine life, bunks, tiny kitchen, scientific equipment.
  • Unique feature: Moon pool acts as an entrance/exit and is critical for decompression and safe return to the surface.
  • Quote: “Waking up and seeing a fish sitting there, kind of staring into the habitat—so that was pretty neat.” (12:53, Dr. Dawn Kernagis)
• Crew Dynamics: Tight living space, close teamwork, and round-the-clock monitoring.

Physiological and Cognitive Adaptation

[15:40 – 18:02]

• Saturation Diving: Underwater living leads to prolonged exposure to high pressure and inert gas (nitrogen), allowing longer excursions outside.
  • Studying immune and coagulation changes, team performance, and cognitive effects.
  • Existing research mostly comes from military and commercial diving; new technologies promise greater understanding.
  • Risks such as bone osteonecrosis, managed by advances in procedure.

Comparing Extreme Environments

[18:02 – 20:33]

• Shared Challenges: Oxygen and CO2 levels, equipment, and physiological stress are common issues whether underwater, at high altitude, or in space.
• Space vs. Sea: Long-duration spaceflight and repeated underwater missions both spark changes in the brain and body—now being studied more closely.
  • Referenced studies on “brain shift” in astronauts, exploring whether such adaptations are beneficial.

Psychological Impacts: The "Underview Effect"

[20:33 – 22:35]

• Concept: Much like astronauts’ “overview effect”—awe and connectedness from seeing Earth from space—aquanauts experience an “underview effect” after prolonged submersion.
  • Quote: “It just gives you that scope of... where you are in this planetary system... the responsibilities we have to protect that system.” (21:18, Dr. Dawn Kernagis)
  • Kernagis’ team at DEEP aims to extend this perspective to non-scientists, including policymakers and business leaders.

Re-adjustment to Land Life

[22:35 – 24:32]

• Physical Changes: Temporary high salt intake, sleep deprivation, general euphoria, missing the underwater environment.
  • Quote: “I really don’t want to go back to Earth... Dawn, you’re on Earth, by the way.” (23:32, Dr. Dawn Kernagis)
• Emotional Response: Sense of loss leaving the close-knit, vibrant world beneath the waves.

Career Path Reflection

[24:34 – 26:48]

• Building a Unique Career: Kernagis emphasizes curiosity, asking questions, and strong mentorship.
  • Early scuba training led to immersion in marine science and ultimately neuroscience.
  • Quote: “None of this is planned... It’s asking questions and really good mentorship.” (25:01, Dr. Dawn Kernagis)
• Advice: Reach out to mentors, seek out interdisciplinary opportunities, and remain adaptable.

Science Spotlight: AI’s New Approach to Measuring Pain

[29:16 – 32:56]

• The Problem: Pain scales are subjective and ineffective for non-communicative patients.
• AI Solution: German researchers combine heart rate data (via contactless rPPG technology) and facial expression analysis to more objectively gauge pain.
  • Model tested on patients after cardiac catheterization; achieved 45% accuracy—setting a preliminary standard for the field.
  • Limitations: Heart rate sensors can be less accurate on melanated skin; facial expression data may not represent all patients.
• Outlook: As technology and data representation improve, pain measurement and management could become more accurate and equitable.

Notable Quotes & Memorable Moments

• “You really just become a part of that ecosystem at the bottom of the ocean.”
  – Dr. Dawn Kernagis, [09:46]

• “Waking up and seeing a fish sitting there, kind of staring into the habitat—so that was pretty neat.”
  – Dr. Dawn Kernagis, [12:53]

• “If Apollo was one small step for man, I think of Artemis as giant steps for humanity in space and here on earth.”
  – Dr. Samantha Yammine, [05:45]

• “It just gives you that scope of... where you are in this planetary system... the responsibilities we have to protect that system.”
  – Dr. Dawn Kernagis, [21:18]

• “I really don’t want to go back to Earth... Dawn, you’re on Earth, by the way.”
  – Dr. Dawn Kernagis, [23:32]

• “None of this is planned... It’s asking questions and really good mentorship.”
  – Dr. Dawn Kernagis, [25:01]

Key Timestamps

• 01:44 – 06:46 – Artemis mission and rationale for moon exploration
• 08:39 – Dr. Dawn Kernagis interview begins
• 12:44 – Living inside the underwater habitat
• 15:40 – Physiological effects of saturation diving
• 18:02 – Comparing sea, space, and altitude environments
• 20:33 – “Underview effect” and psychological impacts
• 22:35 – Returning to land after underwater living
• 24:34 – Dr. Kernagis’ career journey
• 29:16 – 32:56 – AI and the future of pain measurement

Conclusion

This episode offers a fascinating, multilayered look at how extreme environments—both in the depths of the ocean and beyond our planet—push the boundaries of science, technology, and human adaptation. Through first-hand aquanaut experiences, an inspiring vision for lunar exploration, and innovative AI for healthcare, Curiosity Weekly delivers science storytelling that’s both personal and universal.