Transistors
January 21, 2026 • EPISODE 294
What is a transistor and why is it important? In this episode of Science LIVE, Dr. Roger Billings explores how transistors control electric current, replaced bulky vacuum tubes, and made modern electronics possible—from radios to computers and smartphones. The episode also features a tiny bug-like robot developed by MIT and the fascinating story of Henry Ford and how Thomas Edison influenced the development of the automobile.
About DrB
Dr. Roger Billings is a visionary innovator whose work has touched the lives of millions of students and transformed the landscape of education. Widely known as “DrB” to the countless kids who benefit from his groundbreaking Acellus learning system, Dr. Billings has dedicated his life to advancing education through technology.
As part of DrB’s lifelong commitment to supporting education, Science LIVE was launched as a way to “give back” by mentoring students in conjunction with the Roger Billings Scholarship Program.
Read more about DrB »
About the Roger Billings Scholarship Program »
hello from Missouri!
Hi from illinois
heyyy
Hello from Missouri
Hello to all Acellus students I hope evryone hade a good week
Hello from Mississippi!
that cool
im so glad to be here
Hello!
Are some animals genuinely robots and we just don’t know?
Hi from CT!! Love the weekly science lives!
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Hello from Georgia
HI FROM VA
I enjoyed learning about the sharks!
A robot insect? So interesting!
Hello!
Hello from Texas.
Hi from Missouri
Hi!
hi im here
Hello From Maryland! Very hyped up for today’s episode.
Hi how are you
hi from texas love the lives.
love this👌🏽
Hey from Florida!
how can insects move so fast?
here from GA!
i like technology its fun
I truly wonder how small robots can get
This is cool.
Hello from MD
this is interesting
Hi from Texas!
Happy Birthday Dr Roger Billings!!!
Hello
Hello from Houston 🙂
Hello from Florida!
Hello from Michigan
Happy Wednesday!!
Love science live ❤️
hiiii
Happy belated birthday Dr. B!!!
Hello from missouri!
How many named shark breeds are there?
Hi!
flying in hot from the east coast
Hello! here from North Carolina, im excited learn more!
Good evening from Madison TN
Hello from Illinois
hello from texas
Hello from North Carolina, glad I could make it, hopefully we can view another innovative episode
Hello
Hello, everyone!
Hello from Tx!
CommentHi from Georgia.
oh that’s cool, I love sharks they are so fascinating.
Hi
hey
Hi from Maine
happy wednesday everyone! <3
Hi from Alabama I love science
.
hello!
Sharks can help us determine the water flow in the ocean.
Hello from michigan
josiah from missouri
heyo ! here from nc, love learning new stuff from this live !!
Hiiiiii
hi
hello from kansas.
hi from Texas!
THIS MY FIRST TIME! Pretty exciting.
Where can I find more information on these sharks they sound really neat.
What oceans can you find those sharks?
Sharks are so cool!
What are some of the other characteristics of the sharks?
love this live
Very cool to learn about that shark
Science live is amazing!!!!!
Hey everyone. from Virginia. It is calling for 10 to 16 inches of snow this weekend, and I’m so excited!
How does the shark not use any energy?
hello from la
Hi from TENNESSEE
Esteem watching from Nevada!
Hi from florida
hi
hello every body NC here
Hello!
Hi from Texas!
hello! i’ve always been interested in sea life, i feel like sharks are misunderstood
saving sharks? Wow!
Here from arkansas getting ready for a winter storm hitting here on Friday night all thru the weekend they are calling up to a max of 2 feet of snow or 2 inches of ice
hi
Hello from Arkansas.
Hi from Texas! :]
happy science live.
Wow sharks are very cool and fun, but dangerous, very dangerous
I’m from wierton wv
Hello from Indiana! Do you offer, or are you going to offer, an online college program?
I would to watch the sharks! How Cool!!!
hello
hello from Houston!
Good evening
I can’t wait too see tonight’s Science Live.
Good evening
So excited for science live today!
Hello
so excited for science live! from georgia
how big are eplec sharks
Do those sharks still exist and if so could we use them to help us?
That shark sounds pretty cool
Hello form Georgia
Hello science live from Missouri!
Hello!
Hello
love this
Hi from Illinois!
Howdy from Texas!
Hello!
Already wednesday!? im so excited!!! Love science live!
Woah I wonder if other sharks can do that or if its the only one?
Hi everyone! Super excited to learn more about science!
Hello from California! I’m excited for todays Science Live!
I am here
Hello from Georgia!
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Hello from Texas!
Hello from a farmer!!
HI HERE FROM MO SOOOO HAPPY
Hello from New York!
Hello!
hi everyone
wow, there’s been nearly 300 episodes’ of this. that’s impressive
How many species of sharks are there in the world
Hi from Mississippi! What did you eat for dinner? I had pizza.
Sharks are really cool
Hello, from North Carolina!
Where do these kind of sharks live and what do they eat?
Hello from New York.
Good evening from Virginia.
i love acellus
hi from florida
Hi, from Maryland!!
Hello from Chicago!!!!!!!!!!!!
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Hello from Nashville Tennessee
hello from tn!!
How many types of sharks are there in the world that we know of?
Hello from Texas!
I love sharks
Finally SCIENCE LIVE started.🤩🤩
how big is the shark?
Hello From NJ
Yay science live
Hello from Texas!
Good evening!!
I’m excited for the science live
what are elptic sharks
hello from texas
Hello from SC!
LOVE SCIENCE LIVE SOO COOL LOVE YOU PAJEt
Hello from MD. Hope everyone is well on this chilly Wednesday evening.
Hello, from Texas
Yesss, brynlee here!
Hello from Texas !!!
hiii i love watching these lives!
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Hello from TN!!!
Good afternoon!
Hello from Illinois!!!
hi from montana
Hello from Gunner in South Carolina!!! Looking forward to learning tonight!
Hello from FL!
I like biology.
Hi From New York
I AM EXCIDED FOR TODAY SCIENCE LIVE.
hi from MD… love the show
Hello from California! thank you for another amazing video!
hello from CT