Mysteries of the Microscopic World
Course Overview
Join a scientific detective story through a world of wonder with an award-winning professor.
Course No. 1551
An invisible world of astonishing complexity surrounds us – a realm where:
- Hundreds of thousands of microbes could fit on a period
- Bacteria in your gut help digest food
- Pathogens constantly threaten our health
- Viruses have shaped human history
This 24-lecture journey explores our complex relationship with microorganisms, from deadly pandemics to beneficial symbiosis.
Key Topics Covered:
- History of germ theory and disease
- Evolutionary arms race between humans and microbes
- Devastating pandemics like the 1918 flu and AIDS
- How the immune system battles invaders
- Microbes as both weapons and allies
- Future of microbial research
Video Lectures
01: The Invisible Realm (32 min)
Discover the physics of microbial life where water feels like molasses and spheres become survival strategies.
02: Stone Knives to Iron Plows (32 min)
Learn how human settlements and agriculture created perfect conditions for deadly epidemics.
03: The Angel of Death (28 min)
Track Yersinia pestis, the bacterium behind the Black Death, and other vector-borne diseases.
04: Germ Theory (27 min)
Follow Pasteur, Koch and Semmelweis as they prove invisible organisms cause disease.
05: The Evolutionary Arms Race (33 min)
Examine antibiotic resistance – how overuse turns miracle drugs into weakened tools.
06: Microbial Strategies (30 min)
Compare human immune defenses with microbes’ frighteningly effective countermeasures.
07: Virulence (29 min)
Understand why some diseases grow milder (syphilis) while others become deadlier (vector-borne pathogens).
08: Death by Chocolate (28 min)
See how human activities like cacao farming spread Oropouche fever and other illnesses.
09: Bambi’s Revenge (30 min)
Discover how deer population explosions enabled Lyme disease’s spread across America.
10: The Germ of Laziness (29 min)
Learn how hookworm shaped Southern stereotypes and impacted Civil War outcomes.
11: The 1918 Flu – A Conspiracy of Silence (28 min)
Investigate the virus structure and mutations behind history’s deadliest pandemic.
12: The 1918 Flu – The Philadelphia Story (29 min)
Witness a city’s collapse as 675,000 Americans perish from the mutated flu strain.
13: The 1918 Flu – The Search for the Virus (28 min)
Follow scientists’ gripping quest to recover intact samples of the 1918 killer.
14: Immunity – Self versus Non-Self (29 min)
Explore how immune cells distinguish invaders from the body’s own tissues.
15: Adaptive Immunity to the Rescue (30 min)
Marvel at how a few hundred genes create 100+ million pathogen-specific defenses.
16: AIDS – The Quiet Killer (31 min)
Analyze HIV’s lethal strategy of attacking the immune system itself.
17: The Deadly Strategy of AIDS (31 min)
Consider future pandemic scenarios and challenges in vaccine development.
18: Autoimmunity – Self versus Self (30 min)
Investigate why the body sometimes attacks itself in diseases like lupus and MS.
19: Allergies and Asthma (30 min)
Trace the microscopic chain reactions behind peanut allergies and asthma attacks.
20: Microbes as Weapons (29 min)
Examine germ warfare from medieval corpse catapults to WWII’s Unit 731.
21: Pandora’s Box (30 min)
Uncover Cold War bioweapons programs that made microbes deadlier than nukes.
22: Old World to New (29 min)
Learn how European diseases decimated Native populations lacking immunity.
23: Close Encounters of the Microbial Kind (31 min)
Search for extraterrestrial microbes in extreme Earth environments and beyond.
24: Microbes as Friends (31 min)
Celebrate beneficial microbes producing oxygen, yogurt, medicines and environmental solutions.

