There are lots of ways that evolution happens, and natural selection is just one of them. In this episode of Crash Course Biology, we’ll find out how this process works and shapes traits in all living things —from ginkgo trees to howler...

Most trees reach for the sun – but not the weeping willow. Why?

Paul Andersen details the first 7 of 13 labs in the AP Biology Curriculum. The following topics are all covered: Artificial Selection, Hardy-Weinberg Equilibrium, Comparing DNA using BLAST, Diffusion and Osmosis, Photosynthesis,...

Just like animals, plants evolve and change over time. And you might think we'd be looking for things like fossils to figure out how they've changed, but some scientists are using a far less traditional resource: art.

Paul Andersen reviews the major concepts within the second unit of the new AP Biology framework. He starts by describing how life is organized into three domains. He explains how the history of life on the planet is...

When you look at sporting achievements over the last decades, it seems like humans have gotten faster, better and stronger in nearly every way. Yet as David Epstein points out in this delightfully counter-intuitive talk, we might want to...

Paul Andersen explains how life has evolved and continues to evolve today. A brief discussion of artificial, natural and sexual selection is included. The beak of the finch is used to explain how directional selection is achieved.

Different dogs look incredibly different - but that doesn't mean they are necessarily more diverse.

In this video Paul Andersen defines natural selection as differential reproductive success. He then explains how natural selection shapes organisms on our planet through variation and selection. A K-12 teaching progression is also...

Hank explains speciation - the evolutionary process by which new biological species arise - in terms of finches, ligers, mules, and dogs.

Paul Andersen explains the importance of selection in biology. Artificial selection occurs when humans choose traits that will be selected for or against. This has created the variety of domesticated animals and crops. He then...

Remember how Darwin and Mendel lived around the same time, but everyone forgot about Mendel until 1900, and even then biologists saw Darwinism and Mendelism as two competing grand theories about how life works?

Well, in this episode...

Paul Andersen describes pieces of evidence that Charles Darwin used to support the idea of evolution and his process of natural selection. He begins with the following evidence use in the Origin of Species; artificial selection,...

Hank guides us through the process of natural selection, the key mechanism of evolution.

2 min video describing Artificial Selection for middle school science

The video “Selecting a Change” introduces the concepts of natural and artificial selection and discusses examples of each.

A video entitled “Decoding DNA” which introduces DNA and explains the role it plays in reproduction and biotechnology.

This week on Nature League, Brit explores the incredible process of domestication and answers Adrian's question about keeping a house opossum.

By now we've hopefully all seen Alien: Covenant. If you haven't, go see it right away! It's awesome, and this has spoilers. After you've seen it, you'll probably have a few questions, just as I did. The main thing that left me...

Selective breeding is also known as artificial selection. It is the process by which humans breed plants and animals for particular genetic characteristics. We have been doing this for thousands of years - ever since we first bred food...

In this video, we explore the concept of natural selection, proposed by Charles Darwin. Natural selection is a process where individuals with traits best suited to their environment survive and pass on these favorable traits to their...