Uploaded May 2026 | Updated September 2026, 2 weeks ago
In this episode of Earth Investigators Science, our undercover alien agents are tackling a truly gross human phenomenon: sickness! After observing strange human behaviors like sneezing, coughing, and nose-blowing, the agents hit the streets to ask real humans about their experiences with illness.
To understand what actually happens when a virus hits, one brave agent steps into the simulator to experience a flu infection firsthand. Discover how the human body uses mucus and fevers to fight back, how medical professionals like doctors, nurses, and pharmacists diagnose and treat illnesses, and the top 3 ways humans can avoid getting sick. Remember: always wash your hands, and maybe stop licking handrails on public buses!
Chapter Markers
00:00 - A Classified Mission to Earth
01:00 - Case #24: Hot-Button Tissues
01:40 - Strange Human Behaviors: Sneezing & Coughing
02:33 - Fast Facts About Sneezing
03:56 - Hitting the Streets: Asking Humans About Sickness
07:20 - Entering the Sickness Simulator
08:11 - Mucus: The Body’s Gross Defender
08:41 - Fever: Turning Up the Heat on Viruses
09:08 - Why Staying Hydrated Matters
10:21 - How Do Humans Become Doctors?
12:26 - How Doctors Diagnose Illnesses
12:53 - Why Do We Get Sick When Seasons Change?
15:41 - Top 3 Ways to Avoid Getting Sick
18:45 - Mission Accomplished!
Earth Science Investigators sees extra-terrestrial operatives Major Letdown and Private Groupchat, also known as the worst undercover detectives in the universe, find out what is going on around the world.
Subscribe for more at YouTube.com/Channel9
In this episode of Earth Investigators Science, our undercover alien agents are tackling a truly gross human phenomenon: sickness! After observing strange human behaviors like sneezing, coughing, and nose-blowing, the agents hit the streets to ask real humans about their experiences with illness.
To understand what actually happens when a virus hits, one brave agent steps into the simulator to experience a flu infection firsthand. Discover how the human body uses mucus and fevers to fight back, how medical professionals like doctors, nurses, and pharmacists diagnose and treat illnesses, and the top 3 ways humans can avoid getting sick. Remember: always wash your hands, and maybe stop licking handrails on public buses!
Chapter Markers
00:00 - A Classified Mission to Earth
01:00 - Case #24: Hot-Button Tissues
01:40 - Strange Human Behaviors: Sneezing & Coughing
02:33 - Fast Facts About Sneezing
03:56 - Hitting the Streets: Asking Humans About Sickness
07:20 - Entering the Sickness Simulator
08:11 - Mucus: The Body’s Gross Defender
08:41 - Fever: Turning Up the Heat on Viruses
09:08 - Why Staying Hydrated Matters
10:21 - How Do Humans Become Doctors?
12:26 - How Doctors Diagnose Illnesses
12:53 - Why Do We Get Sick When Seasons Change?
15:41 - Top 3 Ways to Avoid Getting Sick
18:45 - Mission Accomplished!
Earth Science Investigators sees extra-terrestrial operatives Major Letdown and Private Groupchat, also known as the worst undercover detectives in the universe, find out what is going on around the world.
Subscribe for more at YouTube.com/Channel9
