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After Charles Darwin first visited the island archipelago of Galapagos in 1839, it took him another twenty years to decipher that the scene he'd witnessed was the most perfectly preserved biodiversity on the planet. His theory of evolution, published 150 years ago, pulled back the curtain on a debate that had been simmering for years, and still percolates. Today Darwin would be surprised by the tourist mecca Galapagos has become--200,000 visitors a year, 40,000 permanent residents. The impact on the most unique collection of endemic wildlife in the world has been heavy. Too many people are bringing too many of their ways (and invasive species) from the outside world that are threatening the future of this one-of-a-kind place. What would Darwin think of how Galapagos has evolved in the twenty-first century?
(Source: DCMP)
Charles Darwin’s father wants him to be a pastor, but Darwin has a passion for science. At the encouraging of his uncle, he boards a Royal Navy ship known as the HMS Beagle. The voyage lasts for five years, and Darwin’s discoveries will revolutionize science. During the voyage, he spends most of his time on land performing methodical observations, which lead to his theories on evolution and natural selection. Part of the “Butterfly Effect” series.
British naturalists Charles Darwin and Alfred Russel Wallace both set out on epic adventures to study various species and their development. They gathered evidence on the variation among individual members of a species, the relationships among species, and the patterns of geographic distribution across many species. Based on such evidence, they independently came to the same revolutionary conclusions: species change over time by means of natural selection, and species descend from other species.
Charles Darwin journeyed to the Galapagos Islands at the age of 22. He spent five weeks among the wildlife, eventually leading to the publication of "On the Origin of Species." Part of the "Around the World" series.
Charles Darwin once boldly predicted that buried deep in the earth are transitional fossils of creatures with intermediate features between ancestral animal groups and the modern animal groups. Since Darwin’s time, many transitional fossils have been discovered, and they provide crucial insights into the origin of key structures and the creatures that possess them. And University of Chicago paleontologist and award-winning author Neil Shubin provides a first-hand account of the painstaking search for the transitional fossil of Tiktaalik, a creature with a mix of features common to fish and four-legged animals.
The cloning of Dolly the sheep can trace its origins all the way back to Charles Darwin's trip to the Galapagos Islands in the 1800s. Darwin's evidence for evolution was overwhelming, but scientists still didn't know how traits passed from parent to offspring. As microscopes improved, scientists were able to see cells divide and eventually discovered the genes that make up DNA. This, along with other technological advances, has opened up an exciting new area of scientific study: nanotechnology.
Charles Drew set a standard of excellence unparalleled by most of his white contemporaries. In 1943, his distinction in his profession was recognized when he became the first black surgeon to serve as an examiner on the American Board of Surgery. Despite the prejudices of American society in the first half of the 20th century, Charles Drew persevered in his practice and was never afraid to stand up for his beliefs and racial equality.
Diagram of the internal organs of a frog as shown in a dissection. Design modalities for the image include braille with and without labels, print with and without labels in greyscale, color, and texture.
(Source: Benetech)
In nuclear physics, nuclear fusion is a nuclear reaction in which two or more atomic nuclei come close enough to form one or more different atomic nuclei and subatomic particles (neutrons and/or protons). The difference in mass between the products and reactants is manifested as the release of large amounts of energy. This difference in mass arises due to the difference in atomic "binding energy" between the atomic nuclei before and after the reaction. Fusion is the process that powers active or "main sequence" stars, or other high magnitude stars.
(Source: APH)
Braille labelled diagram showing the parts of an eye.
Tongue taste areas The tongue is a muscular organ in the mouth of most vertebrates that manipulates food for mastication, and is used in the act of swallowing. It is of importance in the digestive system and is the primary organ of taste in the gustatory system. The tongue's upper surface (dorsum) is covered in taste buds housed in numerous lingual papillae. It is sensitive and kept moist by saliva, and is richly supplied with nerves and blood vessels. The tongue also serves as a natural means of cleaning the teeth. A major function of the tongue is the enabling of speech in humans and vocalization in other animals. The human tongue is divided into two parts, an oral part at the front and a pharyngeal part at the back. The left and right sides are also separated along most of its length by a vertical section of fibrous tissue (the lingual septum) that results in a groove, the median sulcus on the tongue's surface. There are two groups of muscles of the tongue. The four intrinsic muscles alter the shape of the tongue and are not attached to bone. The four paired extrinsic muscles change the position of the tongue and are anchored to bone. Do you have good taste? In this video segment, Dr. Linda Bartoshuk explores the sense of taste in humans - why we have it, and what happens when we lose it. Learn why the sense of smell is also important to our experience of food. Footage from NOVA: "Mystery of the Senses: Taste".
(Source: OpenStax)
This transmission electron micrograph of a mitochondrion shows an oval, outer membrane and an inner membrane with many folds called cristae. Inside of the inner membrane is a space called the mitochondrial matrix. Unlike prokaryotes, eukaryotic cells have a nucleus and other membrane-bound organelles that allow the cell to compartmentalize different functions. These videos will provide an overview of eukaryotic cells and will take you through the structures and functions of the various organelles found within the plasma membrane.
Erbium is a chemical element with the symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements.
(Source: Library Lyna)
3D Model Dinosaur T-Rex Skull and Base.
(Source: Thingyverse)
Illustration showing the carbon cycle using animals and plants.
Remixed from Customizable Atom Delux by roman_hegglin. Helium is a chemical element with symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Its boiling point is the lowest among all the elements.
Labelled parts of the Human Inner Ear
Labelled parts of the Human Large Intestine
Hydrogen is the chemical element with the symbol H and atomic number 1. With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table.
Helium is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Its boiling point is the lowest among all the elements.
Showing collections 1 to 6 of 6
Resources related to vision
A collection containing 12 resources, curated by Charles LaPierre
3D models and images of the entire periodic table of elements
A collection containing 118 resources, curated by Library Lyna
Collection of anatomy resources
A collection containing 21 resources, curated by Benetech
Biology related concepts
A collection containing 59 resources, curated by Benetech
A collection of simulations from PhET.
A collection containing 15 resources, curated by Charles LaPierre
A collection of Chemistry related resources
A collection containing 67 resources, curated by Benetech
