MinutePhysics
Protecting Privacy with MATH (Collab with the Census)
This video was made in collaboration with the US Census Bureau and fact-checked by Census Bureau scientists. Any opinions and errors are my own. For more information, visit...
Crash Course
How P-Values Help Us Test Hypotheses - Crash Course Statistics
Today we're going to begin our three-part unit on p-values. In this episode we'll talk about Null Hypothesis Significance Testing (or NHST) which is a framework for comparing two sets of information. In NHST we assume that there is no...
3Blue1Brown
Exponential growth and epidemics
A primer on exponential and logistic growth, with epidemics as a central example
Crash Course
P-Value Problems - Crash Course Statistics
Last week we introduced p-values as a way to set a predetermined cutoff when testing if something seems unusual enough to reject our null hypothesis - that they are the same. But today we’re going to discuss some problems with the logic...
Bozeman Science
Solving Hardy Weinberg Problems
Paul Andersen shows you how to solve simple Hardy-Weinberg problems. He starts with a brief description of a gene pool and shows you how the formula is derived. He then shows you how to solve a couple of sample problems.
SciShow
How an Army of Crayfish Clones Took Over Europe
It sounds like something out of a sci-fi movie: a new crayfish population made entirely of asexually reproducing, all-female clones. But is it a new species?
TED-Ed
TED-ED: A clever way to estimate enormous numbers - Michael Mitchell
Have you ever tried to guess how many pieces of candy there are in a jar? Or tackled a mindbender like: _How many piano tuners are there in Chicago?" Physicist Enrico Fermi was very good at problems like these -- learn how he used the...
Crash Course
The Normal Distribution - Crash Course Statistics
Today is the day we finally talk about the normal distribution! The normal distribution is incredibly important in statistics because distributions of means are normally distributed even if populations aren't. We'll get into why this is...
SciShow
What 100,000+ Children Taught Us About Neglect in Early Childhood
Neglect in the first few years of a child’s life can have many adverse consequences, and one of the largest studies on these effects occurred after the Romanian Revolution in 1989.
Bozeman Science
Biodiversity
Paul Andersen explains the importance of biodiversity. He starts by describing how biodiversity can be species, genetic or ecosystem diversity. He explains the importance of keystone species in an environment and gives two examples; the...
SciShow
5 Ways Orcas Have Earned the Nickname “Killer Whale”
Orcas are some of the most effective predators in the ocean, and each population of them has entirely different prey preferences and hunting techniques, more than earning their nickname “killer whale!” Chapters 1 MAKING WAVES 2:12...
Crash Course
Population, Sustainability, and Malthus: Crash Course World History 215
In which John Green teaches you about population. So, how many people can reasonably live on the Earth? Thomas Malthus got it totally wrong in the 19th century, but for some reason, he keeps coming up when we talk about population. In...
Bozeman Science
Genetic Drift
Paul Andersen describes genetic drift as a mechanism for evolutionary change. A population genetics simulator is used to show the importance of large population size in neutralizing random change. The near extinction of the northern...
Amoeba Sisters
Genetic Drift
Discover what happens when random events meet allele frequencies: genetic drift! This Amoeba Sisters video also discusses the bottleneck and founder effect as well as contrasts genetic drift with natural selection. Table of Contents:...
SciShow
Common Misconceptions About Evolution
Evolution is particularly vulnerable to misunderstandings around the scientific language. SciShow clears up some confusing language!
Bozeman Science
Fishing
In this video Paul Andersen explains how various techniques have been used for years to collect seafood. Commercial fishing has led to overfishing in certain areas and species due to the tragedy of the commons. An explanation of...
Crash Course
Where and Why Do People Move? Crash Course Geography
People have been migrating and transplanting since before recorded history, and understanding the reasons why people migrate can help explain some of the cultural, economic, and political patterns we see around the world. Today, we’re...
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...
TED Talks
TED: Will automation take away all our jobs? | David Autor
Here's a paradox you don't hear much about: despite a century of creating machines to do our work for us, the proportion of adults in the uS with a job has consistently gone up for the past 125 years. Why hasn't human labor become...
Crash Course
Population & Food: Crash Course Geography
Today we’re going to talk about the link between population and food energy. As the world's population keeps growing, finding ways to provide enough food and water for everyone while supporting a sustainable environment can be tricky!...
Bozeman Science
Human Population Dynamics
In this video Paul Andersen explores population dynamics of the human population. The population has show exponential growth since the industrial revolution and all countries will eventually move through the demographic transition. If...
Crash Course
How Populations Grow and Change: Crash Course Geography
Is the world overpopulated or underpopulated? While we worry about there being too many people for the planet to support, we can also worry about how fewer people in a given place may affect the economy, what may happen when there are...
Crash Course
Conservation and Restoration Ecology: Crash Course Ecology
Hank wraps up the Crash Course on ecology by taking a look at the growing fields of conservation biology and restoration ecology, which use all the kung fu moves we've learned about in the past eleven weeks and apply them to protecting...