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What is the scientific purpose of collecting voucher species? In this episode, host Emily Graslie discusses how these specimens will inform future generations about changes in species over time. Part of "The Brain Scoop" series.
(Source: DCMP)
Many endangered animals are protected under the U.S. Endangered Species Act. The Endangered Species Act of 1973 is one of the most effective conservation laws in the United States. Using science-based management plans, it has prevented the extinction of 99% of the species it protects. Part of the "Endangered Ocean" 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.
Are humans the accidental products of an uncaring universe? Or are they the beneficiaries of a cosmic order that was planned beforehand to help them flourish? This documentary explores growing evidence from physics, chemistry, biology, and related fields that our universe was designed for large multi-cellular beings like ourselves. Geneticist and author Michael Denton investigates the special properties of carbon, water, and oxygen that make human life and the life of other organisms possible.
What does it mean to be an endangered species? Are endangered species destined for extinction? Host Emily Graslie explores some of these questions in celebration of Endangered Species Day. Part of "The Brain Scoop" series.
Can we bring back species that are on the brink of extinction? A Native American wildlife biologist Robert Mesta, with the U.S. Fish and Wildlife Service, combines scientific training and traditional Indian values to help bring the Arizona bald eagle off the "endangered species" list.
Sea turtles are found in oceans around the world, and they face many challenges throughout their life cycle. Even before they hatch, these reptiles face tremendous odds against surviving to maturity. Students learn ways to help save this endangered and threatened species. Part of the "Saving a Species" series.
Climate change is threatening the survival of the polar bears in the Arctic. Humans can take action to help reduce the negative effects of climate change and preserve the polar bears' habitat. In this episode, students learn a variety of energy-saving tips to help them reduce energy consumption in an effort to reduce the effects of global warming. Part of the "Saving a Species" series.
Predators play a fundamental role in maintaining the health of ecosystems. Research strongly supports the contributions of wolves in particular to the functioning and stability of the overall landscape. Students will learn about conservation methods to reintroduce and protect wolves in the wild. Part of the "Saving a Species" series.
What determines how many species live in a given place? Or how many individuals of the species can live somewhere? The research that provided answers to these questions was set in motion by the key experiments of ecologists Robert Paine and James Estes. Their research demonstrates just how fundamental keystone species and trophic cascades are in understanding ecology.
Features a wide variety of video footage, photographs, diagrams and colorful, animated graphics and labels. Begins with a simple definition, and this helps clarify pronunciation and provides opportunities to transfer words from working to long-term memory. Also concludes with a critical thinking question. For this particular clip, students will focus on endangered species.
Over the past four decades, evolutionary biologists Rosemary and Peter Grant have documented the evolution of the famous Galápagos finches. They track changes in body traits directly tied to survival, such as beak length, and identify behavioral characteristics that prevent different species from breeding with one another. Their pioneering studies have revealed clues as to how 13 distinct finch species arose from a single ancestral population that migrated from the mainland 2 million to 3 million years ago.
Working in the islands of the Caribbean, biologist Jonathan Losos has discovered the traits that enable dozens of anole species to adapt to different vertical niches in the forest. Differences in limb length, body shape, and toepad size allow different species to flourish on the ground. However, lizards living on thin branches or high in the canopy have different characteristics. These varied adaptations have played a key role in reproductive isolation and the formation of new species.
Towering gypsum dunes span hundreds of square miles in New Mexico's White Sands National Monument, and hundreds of animal species thrive in this unique ecosystem. The lizards living in White Sands National Monument have attracted biologists from the University of California, Berkeley. The lizards are undergoing adaptation and speciation on an extraordinarily rapid timescale. Part of the “Science Nation” series.
In a response to the overfishing of Blue Fin Tuna, Japan began captive fish breeding programs. The University of Tokyo is trying to take these programs a step further. They have started a program to genetically alter mackerel to give birth to blue fin tuna.
Explores the nature, habits, and habitats of manatees, one of earth's most gentle creatures. Explains how they are endangered and how they are nursed back to health after accidents with boats.
Part of "The Living Oceans" series. Reveals the hunting habits of the ocean's deadliest predators: sharks. Captures the mating habits of hammerhead sharks and the hunting habits of blue sharks, six-gilled sharks, sand-tiger sharks, and white-tipped reef sharks. Explores the great white shark hunting seals and sea lions near the Farrallon Islands, explaining that the bloodthirsty animal culls out animals that are weak or ill.
Dr. Randall Hughes is examining diversity within the marsh. She discusses the diversity of the foundation species of a marsh: smooth cordgrass (Spartina alterniflora). Does having a greater diversity of genetically distinct plants make for a healthier marsh? Part of the series "In The Grass, On The Reef."
Nutria, an alien species in Louisiana, is having devastating effects on native wildlife. They are native to South America and have no known natural predators in the wetlands of Louisiana. Zoologist Nick Baker goes to investigate the damage to plant life from these voracious vegetarians. Segment of video from Wild Chronicles Series.
Showing collections 1 to 4 of 4
Resources to teach younger students about animals
A collection containing 58 resources, curated by DIAGRAM Center
Biology related concepts
A collection containing 59 resources, curated by Benetech
Resources related to vision
A collection containing 12 resources, curated by Charles LaPierre
Collection of anatomy resources
A collection containing 21 resources, curated by Benetech
