Barbara McClintock (1902-1992), an American geneticist, received the 1983 Nobel Prize for discovering genetic transposition. Her extensive papers (1927-1991), comprising notes, correspondence, and

Barbara McClintock (1902-1992), an American geneticist, received the 1983 Nobel Prize for discovering genetic transposition. Her extensive papers (1927-1991), comprising notes, correspondence, and photographs, are preserved at the American Philosophical Society.

The National Library of Medicine, in collaboration with the APS, offers a digitized selection of McClintock's papers online through its Profiles in Science project. This site also includes related correspondence from other collections and provides an introduction to McClintock's scientific career. For access to the full collection, researchers should contact the American Philosophical Society.

Vanessa Castle, a Fish and Wildlife Technician and member of the Lower Elwha Klallam Tribe, is featured in the "Beautiful Undammed" episode of the new "Wild Hope" series. Releasing on YouTube

Vanessa Castle, a Fish and Wildlife Technician and member of the Lower Elwha Klallam Tribe, is featured in the "Beautiful Undammed" episode of the new "Wild Hope" series. Releasing on YouTube August 28th, the episode highlights how local communities are restoring land and salmon populations with the newly freed river, bringing vital marine nutrients back to the ecosystem.

The entire "Wild Hope" series begins streaming on YouTube July 31st and is also available on PBS Nature. For more information and to sign up for updates, visit WildHope.tv or explore the launch toolkit here.

For broader insights into our planet's state, visit the FacingFuture Library here.

This video, produced by the Wisconsin Educational Communications Board, follows John Kotar during the 2010 American Birkebeiner cross-country ski race. Having participated in every "Birkie" since

This video, produced by the Wisconsin Educational Communications Board, follows John Kotar during the 2010 American Birkebeiner cross-country ski race. Having participated in every "Birkie" since its 1973 inception, Kotar shares his unique experience.

He also discusses how climate change threatens the race's future. Additional educational resources are available at http://climatewisconsin.org/.

Production credits include Finn Ryan (producer, director, photography), David Nevala (photography, video, editing), Chris Linder (editing), and Asche and Spencer (music).

The Tar Sands Resistance March on June 6, 2015, brought over 5,000 people to St. Paul, MN, marking the region's largest anti-tar sands demonstration. The march delivered a unified message: keep

The Tar Sands Resistance March on June 6, 2015, brought over 5,000 people to St. Paul, MN, marking the region's largest anti-tar sands demonstration. The march delivered a unified message: keep toxic tar sands out of America's Heartland to protect water, climate, and communities.

Produced by MN350, the event featured cinematography and editing by Xiaolu Wang, Nels Shafer, and Will Hanson. Music was provided by Podington Bear and "Submerging Green," alongside the Hoka Hey Drum Group. Key speakers included Tom Goldtooth, Winona LaDuke, Rep. Keith Ellison, Chris Wahmhoff, and Akilah Sanders-Reed.

TED head Chris Anderson introduces "Infectious Generosity," exploring how the internet can supercharge small acts of kindness, transforming lives globally. Discover how to cultivate a generous

TED head Chris Anderson introduces "Infectious Generosity," exploring how the internet can supercharge small acts of kindness, transforming lives globally. Discover how to cultivate a generous mindset, with or without money, and amplify your impact. Anderson encourages: "Be brave. Give what you can, and then be absolutely amazed at what happens next."

Learn more about Infectious Generosity at infectiousgenerosity.org and meet the AI Guru, designed to help you help others, at ai.infectiousgenerosity.org.

Support TED's mission of spreading ideas by becoming a TED Member here.