Dr. Lewicki, PhD

PhD molecular virologist. I write songs that teach science, math & ELA for grades 6–9, every fact checked. Every song free at

[Dr. Lewicki, PhD @DrLewickiPhD]

No nucleus? No problem. 🦠

Bacteria were the first life on Earth and they still outnumber everything alive. Prokaryotic cells in one song, drawn out as you listen. Grades 6–9.

Do bacteria have DNA? 👇

#biology #scichat

[Dr. Lewicki, PhD @DrLewickiPhD]

Four paws, four rules: shots, food, move, check. 🐾

Chocolate, grapes, xylitol, onions, cooked bones: the dog poison list, set to boom-bap, plus the 7-second pavement test.

Why is dark chocolate the worst? 👇

#DogHealth #PetCare

[Dr. Lewicki, PhD @DrLewickiPhD]

Tested on thousands. Given to billions. 💉

How a vaccine is tested: phase 1, 2 and 3 trials, placebos, FDA review, then years of safety watching. Vaccine safety in one song. Grades 6–9.

What is a placebo for? 👇

#vaccines #scichat

[Dr. Lewicki, PhD @DrLewickiPhD]

Your cells adopted bacteria. 🧬

That's where mitochondria came from. Eukaryotic cells in one song: a true nucleus, rooms wrapped in membranes, drawn out as you listen. Grades 6–9.

What does "eukaryote" mean? 👇

#biology #scichat

[Dr. Lewicki, PhD @DrLewickiPhD]

Converted, never created. ⚡

Mitochondria in one song: two membranes, cristae, the matrix, their own DNA, and every step of cellular respiration from glycolysis to ATP synthase. Grades 6–9.

Why do mitochondria have their own DNA? 👇

#SciComm #scichat

[Dr. Lewicki, PhD @DrLewickiPhD]

Protect it. Copy it. Send it out. 🧬

The nucleus in one song: the double-membrane envelope, nuclear pores, chromatin, chromosomes, the nucleolus, and DNA → mRNA → protein. Grades 6–9.

What does the nucleolus build? 👇

#SciComm #scichat

[Dr. Lewicki, PhD @DrLewickiPhD]

One target. One practice run. 💉

A vaccine shows your immune system a germ's shape without the disease, and memory cells keep it for years. How vaccines work, in one song. Grades 6–9.

Why does your body fight a germ faster the second time? 👇

#vaccines #scichat

[Dr. Lewicki, PhD @DrLewickiPhD]

Why are leaves green? 🌿

Chloroplasts in one song: thylakoids, grana and stroma, chlorophyll, the light reactions, the Calvin cycle and rubisco, and how chloroplasts came from cyanobacteria. Grades 6–9.

What does rubisco do? 👇

#SciComm #scichat

[Dr. Lewicki, PhD @DrLewickiPhD]

Wall. Chloroplasts. One giant vacuole. 🌱

Plant cells in one song: the cellulose wall, plasmodesmata, turgor pressure, guard cells and stomata, and photosynthesis vs. respiration. Grades 6–9.

What do guard cells open and close? 👇

#SciComm #scichat

[Dr. Lewicki, PhD @DrLewickiPhD]

Why is there a new flu shot every year? 🔑

Vaccines matched to germs: toxoids for toxins, conjugates for sugar-coated bacteria, live, killed, piece and mRNA vaccines, and the types of HPV, polio and dengue. Grades 6–9.

What is a toxoid? 👇

#SciComm #scichat

[Dr. Lewicki, PhD @DrLewickiPhD]

Great look at osmosis and why red blood cells burst in pure water. Our song Guard It Right walks through the cell membrane, osmosis and why an IV is saline, step by step: https://t.co/btPCnrWHsc

[Evan Murphy @scholarlabedu]

Why do red blood cells burst in pure water?

See osmosis in isotonic, hypotonic and hypertonic solutions, and why animal cells cannot resist it.

https://t.co/SvqHfoUUS5

#Biology #IGCSE #ALevelBiology

[Dr. Lewicki, PhD @DrLewickiPhD]

One message. Three letters at a time. 🧬

How a ribosome turns mRNA into protein: codons, AUG, tRNA, anticodons, peptide bonds and stop codons. Grades 6–9.

Translate AUG-UUU-GGC-UAA. What do you get? 👇

#Biology #scichat

[Dr. Lewicki, PhD @DrLewickiPhD]

One case. One cough. One crowded room. 🛡️

How herd immunity works: R₀, the 1 − 1/R₀ threshold, why measles needs ~95%, and how outbreaks find the gaps. Grades 6–9.

Measles R₀ = 18. What share must be immune? 👇

#HerdImmunity #scichat

[Dr. Lewicki, PhD @DrLewickiPhD]

Alien Robot Heist is live on Roblox 🤖🚀

Grab robot parts off the moon-dome lines, build your bot, then win the Battle Bot Dome. Rookie Cups today at 3, 5 and 7 PM Arizona.

Launch gift code: ROBOTX 🎁
https://t.co/ZWSfMr90T9

[Dr. Lewicki, PhD @DrLewickiPhD]

One cell. One maze of membrane. 🧫

How the ER works: signal peptides, folding, chaperones, quality control, and the smooth ER's lipids, detox and calcium. Grades 6–9.

What happens to a protein that can't fold? 👇

#CellBiology #scichat

[Dr. Lewicki, PhD @DrLewickiPhD]

No nucleus? No problem. 🦠

Bacteria were the first life on Earth and they still outnumber everything alive. Prokaryotic cells in one song, drawn out as you listen. Grades 6–9.

Do bacteria have DNA? 👇

#biology #scichat

[Dr. Lewicki, PhD @DrLewickiPhD]

Same time isn't same cause. 🔍

Six vaccine myths checked with the evidence, plus how to check any claim: comparison groups, peer review and retractions, finding the original, and rates vs. headcounts. Grades 6–9.

Why does a study need a comparison group? 👇

#SciComm #scichat

[Dr. Lewicki, PhD @DrLewickiPhD]

One test. One score. Out of a hundred. 🎯

Percents on test day as a rock duet: your score, discounts, tax, tips and percent change. Grades 6–9.

You got 18 out of 20. What's your percent? 👇

#iteachmath #MTBoS

[Dr. Lewicki, PhD @DrLewickiPhD]

Percent means out of a hundred. 💯

Percents in one boom-bap track: percent of a number, discounts, tax, tips and percent change. Grades 6–9.

What is 15% of 60? 👇

#iteachmath #MTBoS

[Dr. Lewicki, PhD @DrLewickiPhD]

Whatever you do to one side, do to the other. ⚖️

Solving equations in one rock anthem, with a balance scale on screen the whole time. Grades 6–9.

Solve it: 4x − 7 = 21 👇

#iteachmath #MTBoS

[Dr. Lewicki, PhD @DrLewickiPhD]

No wall. The shape fits the job. 🧠

Animal cells in one song: nerve, blood and muscle cells, lysosomes, centrioles, cilia and flagella, cell junctions, and animal vs. plant cells. Grades 6–9.

What does a lysosome do? 👇

#SciComm #scichat