Crash Course
Biology Before Darwin: Crash Course History of Science
You’ve probably heard of Charles Darwin, but before we get to him, you really need to understand how different people, throughout the seventeenth and eighteenth centuries, tried to answer the same question: “what is life?”
Bozeman Science
Biotic and Abiotic Factors
Paul Andersen differentiates between biotic and abiotic factors. He explains how both abiotic and biotic factors can affect organisms at the level of the cell, the population and even the ecosystem. The complexities of biofilms,...
TED-Ed
TED-ED: The evolution of the human eye - Joshua Harvey
The human eye is an amazing mechanism, able to detect anywhere from a few photons to a few quadrillion, or switch focus from the screen in front of you to the distant horizon in a third of a second. How did these complex structures...
Curated Video
Human Population Growth - Crash Course Ecology
If being alive on Earth were a contest, humans would win it hands down. We're like the Michael Phelps of being alive, but with 250,000 times more gold medals. Today Hank is here to tell us the specifics of why and how human population...
PBS
From the Fall of Dinos to the Rise of Humans
After taking you on a journey through geologic time, we've arrived at the Cenozoic Era. Most of the mammals and birds that you can think of appeared during this era but perhaps more importantly, the Cenozoic marks the rise of organisms...
PBS
What Was the Ancestor of Everything?
The search for our origins go back to a single common ancestor -- one that remains shrouded in mystery. It's the ancestor of everything we know and today scientists call it the last universal common ancestor, or LUCA.
Bozeman Science
LS1C - Matter and Energy Flow in Organisms
Sustaining life requires substantial energy and matter inputs. The complex struc- tural organization of organisms accommodates the capture, transformation, trans- port, release, and elimination of the matter and energy needed to sustain...
TED-Ed
TED-Ed: The operating system of life - George Zaidan and Charles Morton
Humans, octopi and pine trees alike are all made up of cells, tiny but sophisticated systems that keep life going. Cells are almost like tiny factories run by robots, with the nucleus, DNA, proteins, lipids, and vitamins and minerals all...
SciShow
Tiny Extremophiles Living in Rocks!
In freezing cold sand, a burning hot mine, or even inside solid rock _ these extremophiles live anywhere that you wouldn't want to live. What are they? How can they live in such extreme places?
SciShow
Slime Mold: A Brainless Blob that Seems Smart
Slime molds look gross and... not smart, but they definitely seem to communicate and plan even without neurons. Michael explains the science behind these clever eukaryotes.
TED-Ed
TED-Ed: The wacky history of cell theory - Lauren Royal-Woods
Scientific discovery isn't as simple as one good experiment. The weird and wonderful history of cell theory illuminates the twists and turns that came together to build the foundations of biology.
Bozeman Science
Animals
Paul Andersen briefly surveys members of the Domain Animalia. He begins with brief description of the phylogeny of animals. He then describes the characteristics of all animals, heterotrophy, multicellularity, motility and blastula. He...
Crash Course
Old & Odd: Archaea, Bacteria & Protists - CrashCourse Biology
Hank veers away from human anatomy to teach us about the (mostly) single-celled organisms that make up two of the three taxonomic domains of life, and one of the four kingdoms: Archaea, Bacteria, and Protists. They are by far the most...
Bozeman Science
Examples of Natural Selection
Paul Andersen details examples of natural selection in the world. He starts by explaining how changes in global temperatures are causing plants to adapt. He explains how mutations cause changes in phenotype which give organisms varying...
Crash Course
The Global Carbon Cycle - Crash Course Chemistry
In this final episode of Crash Course Chemistry, Hank takes us on a tour of the The Global Carbon Cycle and how it all works. From Carbon Fixation to Redox Reactions, it's all contained within! -- Table of Contents The Carbon Cycle 0:51...
Bozeman Science
Homeostatic Evolution
Paul Andersen shows how homeostasis reflects of evolution through time. The endocrine system shows continuity through flatworms, earthworms and vertebrates. However the respiratory system shows change as organisms move onto land. The...
Bozeman Science
Meiosis
Paul Andersen explains how the process of meiosis produces variable gametes. He starts with a brief discussion of haploid and diploid cells. He compares and contrasts spermatogenesis and oogenesis. He explains how each person is...
SciShow Kids
Lichen Two Living Things In One Biology for Kids
Join Jessi this week at the fort and learn about the unexpectedly awesome organism that's made up of two living things: LICHEN!
Curated Video
Types of Reproduction
New ReviewThis video clarifies the difference between asexual and sexual reproduction of cells.
Curated Video
Levels of Classification
New ReviewThis video outlines the Linnaean classification system when grouping plants and animals.
Curated Video
Importance of Photosynthesis
New ReviewThis video explains how plants and photosynthesis are the basis of all food sources.