What is Bicycle Day?

Reactions is celebrating Bicycle day with some psychedelic science. The chemistry behind LSD has an interesting story. Chemist Albert Hofmann first discovered the psychedelic effects of Lysergic Acid Diethylamide, or LSD-25. we're talking the chemical history of LSD, so get ready to turn on, tune in, but don't drop out... you might just learn something.

Season 4 Episode 9 Length 04:32 Premiere: 04/11/17

Recent Episodes

They Changed Coke and Didn't Tell Anyone

S12 E1 Length 14:19 Premiere Date 02/02/26

Making Citric Acid at Home is Easy (EMOTIONAL DAMAGE)

S11 E13 Length 16:29 Premiere Date 12/31/25

I Used DNA to Fireproof Fabrics

S11 E12 Length 08:34 Premiere Date 12/04/25

Didn't Believe There Were Microplastics in Gum So I Tested My Spit

S11 E11 Length 15:15 Premiere Date 10/22/25

Is Water Magnetic?

S11 E10 Length 08:46 Premiere Date 09/17/25

Liquid Marbles are the Coolest Scientific Breakthrough I've Made (So Far)

S11 E9 Length 11:15 Premiere Date 08/06/25

Specials

Yule Log Chemistry Trivia - 4 Hours of Cozy Fireplace

Length 4:11:33 Premiere Date 12/19/19

Football Helmets: The Last Line of Defense?

Length 03:35 Premiere Date 11/21/19

The Chemistry of Fireworks

Length 06:07 Premiere Date 07/01/19

How to Fry a Thanksgiving Turkey Without Burning Your House

Length 02:57 Premiere Date 11/21/16

Season 4 Episodes

Show Episodes

Show Clips & Previews

The Universe in a Cup of Coffee

S4 E40 Length 04:39 Premiere Date 09/10/18

The Periodic Table Table

S4 E39 Length 05:39 Premiere Date 12/26/17

The One Where We Put Stuff in Acid

S4 E38 Length 05:13 Premiere Date 12/21/17

Why Do Some People Hate Cilantro?

S4 E37 Length 02:44 Premiere Date 12/12/17

How Does Xanax Work?

S4 E36 Length 04:07 Premiere Date 12/05/17

How Do Hand Sanitizers Work?

S4 E35 Length 03:21 Premiere Date 11/28/17

How Do Hand Sanitizers Work?

S4 E35 Length 03:06 Premiere Date 11/28/17

How Does Glassblowing Work?

S4 E34 Length 03:59 Premiere Date 11/21/17

Your Liver and Kidneys Are Good Enough, Put Down the Detox

S4 E33 Length 05:15 Premiere Date 11/14/17

The Chemistry of Hollywood Fake Blood

S4 E32 Length 04:28 Premiere Date 10/27/17

How Do We Know How Old the Earth Is?

S4 E31 Length 04:27 Premiere Date 10/23/17

How Do We Know How Old the Earth Is?

S4 E31 Length 04:24 Premiere Date 10/23/17

How Does Chemotherapy Treat Breast Cancer?

S4 E30 Length 05:21 Premiere Date 10/17/17

3 Egg-cellently Weird Science Experiments

S4 E29 Length 03:46 Premiere Date 10/10/17

Better Pancakes Through Chemistry

S4 E28 Length 04:38 Premiere Date 09/25/17

The Delicious Chemistry of Sushi

S4 E27 Length 05:43 Premiere Date 09/19/17

What Makes Smartphones Explode?

S4 E26 Length 03:13 Premiere Date 09/12/17

What Makes Rubber Rubbery?

S4 E25 Length 04:26 Premiere Date 09/05/17

What Do Astronauts Do With Pee in Space?

S4 E24 Length 04:08 Premiere Date 08/22/17

The Smell of Durian Explained

S4 E23 Length 05:21 Premiere Date 08/15/17

Why Do Superhydrophobic Materials Never Get Wet?

S4 E22 Length 03:24 Premiere Date 08/07/17

7 Wine Facts & Myths

S4 E21 Length 07:36 Premiere Date 08/01/17

7 Wine Facts & Myths

S4 E21 Length 07:08 Premiere Date 08/01/17

Frying Your Way to Better Chicken

S4 E20 Length 04:55 Premiere Date 07/18/17

Dragon's Blood Could Save Your Life

S4 E19 Length 03:58 Premiere Date 07/11/17

Why is the Statue of Liberty Green?

S4 E18 Length 03:45 Premiere Date 06/29/17

Why is the Statue of Liberty Green?

S4 E18 Length 03:35 Premiere Date 06/29/17

Why is Olive Oil Awesome?

S4 E17 Length 04:34 Premiere Date 06/20/17

How Do Anti-Wrinkle Creams Work?

S4 E16 Length 04:33 Premiere Date 06/13/17

Chemistry Life Hacks: Food Edition

S4 E15 Length 04:55 Premiere Date 06/06/17

Does Peeing on a Jellyfish Sting Make it Stop Hurting?

S4 E14 Length 04:55 Premiere Date 05/23/17

The Leidenfrost Effect

S4 E13 Length 04:01 Premiere Date 05/16/17

How Is Whiskey Made?

S4 E12 Length 04:01 Premiere Date 05/02/17

What Do Electrolytes Actually Do?

S4 E11 Length 02:26 Premiere Date 04/25/17

How Do Worms Turn Garbage into Compost?

S4 E10 Length 04:49 Premiere Date 04/19/17