PBS
How Sex Became A Thing
We don't know which living thing was the very first to arrive at the totally revolutionary process that is sexual reproduction but we can follow the history of how (and why) sex became a thing.
SciShow
Condor Females Don’t Need a Male to Hatch Chicks
For the first time, researchers have observed two cases of asexual reproduction in condors. And it also turns out that whales are much hungrier than we thought.
Crash Course
Population Genetics: When Darwin Met Mendel - Crash Course Biology
Hank talks about population genetics, which helps to explain the evolution of populations over time by combing the principles of Mendel and Darwin, and by means of the Hardy-Weinberg equation.
SciShow
Altruism
Hank explains the evolutionary basis for altruistic behavior in animals, including vampire bats!
Bozeman Science
LS3B - Variation of Traits
In this video Paul Andersen explains how variation is created in a population over time. Variation in offspring is caused by genetic recombination, mutations and environmental effects. Parental DNA is recombined using the process of...
SciShow
Mendel Got Extremely Lucky (...or Maybe He Lied)
Science, while often the result of a stroke of genius, can just as easily be a stroke of extraordinarily good luck. Mendel’s work just happened to be a mix of the two.
Bozeman Science
Advanced Genetics
Paul Andersen explains important concepts that can not be explained by simple Mendelian genetics. He begins with a discussion of polygenic inheritance and uses a simulation on height to show how a bell shape curve of phenotypes is...
SciShow
Common Misconceptions About Evolution
Evolution is particularly vulnerable to misunderstandings around the scientific language. SciShow clears up some confusing language!
Crash Course
Population Ecology: The Texas Mosquito Mystery - Crash Course Ecology
Population ecology is the study of groups within a species that interact mostly with each other, and it examines how they live together in one geographic area to understand why these populations are different in one time and place than...
SciShow
Mutant Mosquitoes in Florida
In the search for longevity, scientists have found the longest-lived vertebrates on the planet in the arctic. Meanwhile, in warmer climes, the FDA approves a new method for combating disease-carrying mosquitoes.
Crash Course
Natural Selection - Crash Course Biology
Hank guides us through the process of natural selection, the key mechanism of evolution.
Curated Video
Exploring Our Genetic Connection: Humans and Chimpanzees
In this video, the teacher discusses the genetic similarities between humans and chimpanzees, highlighting that humans share nearly 99% of their DNA with chimps. The teacher also explores the physical and social similarities between the...
Science ABC
Are Dimples Genetic Defects?
Dimples are universally considered a physically attractive feature. Contrary to this positive perception, it results from a genetic defect that gives rise to a double or bifid zygomaticus muscle underlying the cheeks. A dimple simply...
Curated Video
Factpack: Hybrid Animals
Meet weird and wonderful hybrid species, such as the zorse and liger, created by man not nature. Biology - Cells And DNA - Learning Points. A Twig FactPack Film. Open a discussion on what has been already learnt in a topic, or use to...
Curated Video
Asexual reproduction
Reproduction involving just one parent, without the mixing of genetic material with another individual. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....
Curated Video
Poison Arrow Frog
This brightly-coloured frog lays its eggs on the ground and must climb high into the rainforest canopy to transport its young to a watery nursery. How? Biology - Animal Kingdom - Learning Points. Poison arrow frogs have poisonous skin,...
Curated Video
Marbled Salamanders
Why the female marbled salamander must abandon her eggs in order to survive. Biology - Animal Kingdom - Learning Points. Unlike most salamanders, the marbled salamander reproduces entirely on land. The male drops sperm onto the ground...
Curated Video
Factpack: Classification
Discover the systematic grouping of organisms according to the structural or evolutionary relationships among them. Biology - Adaptation And Evolution - Learning Points. A Twig FactPack Film. Open a discussion on what has been already...
Curated Video
Asexual Reproduction in Plants
Some plants don't need both a male and female to reproduce - they can do it alone. Which plants can do this and how do they manage it? Biology - Plants - Learning Points. Plants use a variety of methods to reproduce. Methods include...
Curated Video
Sexual Reproduction in Plants
Discover the parts of plants necessary for reproduction, and the methods by which pollen is carried between flowers. Biology - Plants - Learning Points. Plants reproduce in various ways. Sexual reproduction occurs using male and female...
Curated Video
Cloning
A look at natural cloning and the main artificial cloning techniques devised by man, including embryo transplant and fusion cell cloning. Biology - Cells And DNA - Learning Points. Cloning occurs naturally in asexual reproduction in...
Curated Video
Species
The most basic unit in the classification of types of organisms. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...
Curated Video
Natural Selection - Survival Process
What is natural selection and how does it work? Life processes - Living things in their environments - Evolution Learning Points Genes are passed down from both parents to their young during reproduction. A mutation is a change in genes....
Curated Video
Plant classification
There are thousands of plant species. Find out how they are classified. Life processes - Variation and classification - Classifying living things Learning Points There are thousands of plant species. Plant species are classified...