Scientists have had a variety of hypotheses about how chemical stress can affect DNA to cause aging, but a new study has just shown the process in action. Hosted by: Hank Green

We began keeping goldfish as pets more than 1,000 years ago, but their beauty wasn’t the only thing they had going for them. Goldfish had a lot of really weird biological traits that made them incredibly resilient. And in an unfortunate...

Some of the largest creatures that have ever lived on earth thrive by eating tiny prey. Why don’t they eat bigger fish, and how can they even consume these things they can barely see? Here are 5 creatures that grow to be giants by eating...

Those eerie shining orbs staring at you from the bushes when you take the trash out at night could be any number of animals, but why do their eyes glow like that? Hosted by: Michael Aranda

Our understanding of both clogged arteries and the building blocks of DNA are thanks to the groundbreaking work of Dr. Marie M. Daly, the first Black woman in the U.S. to receive a Ph. D. in chemistry.

The IARC has categorized processed meat as a definite carcinogen. But how dangerous is it really? Do we finally have to give up bacon?

Sea creatures abound this week, as scientists make discoveries about scallop eyes and use models to help figure out the age old mystery, "Which came first, comb jellies or the sea sponge?”

Hank tells us three surprises about human DNA which we learned because of the Human Genome Project.

There’s more to DNA than just the double helix we know and love: under some conditions this familiar molecule can take on unfamiliar forms, each of which can have a different impact on our health.

Why is RNA just as cool as DNA? Join the Amoeba Sisters as they compare and contrast RNA with DNA and learn why DNA should be sharing the limelight! Table of Contents: 00:00 Intro 0:54 Similarities of DNA and RNA 1:35 Contrasting DNA and...

Paul Andersen explains how biogeochemical cycling is used to move nutrients from the environment into living material and back again. He explains the water cycle, the carbon cycle, the nitrogen cycle and the phosphorus cycle. He also...

DNA damage doesn't just happen in the summer, but does that really mean we should wear sunscreen in the cloudy and chilly months?

Hank imagines himself breaking into the Hot Pockets factory to steal their secret recipes and instruction manuals in order to help us understand how the processes known as DNA transcription and translation allow our cells to build proteins.

Mr. Andersen explains the Central Dogma of biology. He shows how DNA is transcribed to form mRNA and how mRNA is translated into a protein.

Paul Andersen describes the molecular structure of DNA. He describes the major parts of a nucleotide and explains how they are assembled into a nucleic acid. The nitrogenous base, deoxyribose sugar and phosphate group make up a single...

The video contains tricks to easily remember point mutations

DNA (Deoxyribonucleic acid) carries the genetic instructions for an organism's growth, development, and reproduction, encoded by sequences of four nitrogen bases: adenine (A), thymine (T), guanine (G), and cytosine (C). These bases form...

Pyrosequencing is a DNA sequencing-by-synthesis method that detects light emitted during nucleotide incorporation, offering a faster and more cost-effective alternative to the traditional Sanger method. It uses a cascade of enzymatic...

In some cases, a cell can fix DNA damage simply by reversing the chemical reaction that caused it. To understand this, we need to realize that "DNA damage" often just involves an extra group of atoms getting attached to DNA through a...

DNA repair mechanisms like base excision repair (BER) and nucleotide excision repair (NER) fix damage by removing and replacing affected regions. BER removes a single damaged base using glycosylases (e.g., to fix deaminated cytosine),...

What is a nucleotide? What is a nucleobase? What is the function of a nucleotide? Nucleotides essentially are the building blocks of DNA and RNA.

In the DNA double helix, the links between the two strands are formed by pairs of much smaller molecules called bases.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning...

A class of large polymer molecules consisting of repeating units called nucleotides.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

An essential stage in cell division and reproduction, allowing genetic material to be copied into a new cell.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images...