In wars, insect-borne diseases killed more than bullets. During WWII, DDT, a miraculous insecticide, was used by the Allies to annihilate millions of insects transmitting malaria and typhus, aiding troop advancement. After the war, DDT brought prosperity to agriculture, making crops more profitable than ever. But a famous writer saw unexpected consequences. Marine biologist Rachel Carson had a gift for communicating science and a passion for nature. 🌿 Her talent took her from editing radio scripts for the U.S. Fish and Wildlife Service to becoming a successful author. Her second book, “The Sea Around Us,” was an immediate bestseller, and its film adaptation won the Oscar for Best Documentary in 1953. 🎥 In the late '50s, a friend wrote to Carson about many songbirds dying near her land after a DDT spraying. This led Carson to investigate the effects of this synthetic pesticide for four years. She discovered three important phenomena: DDT kills all kinds of animals, not just pests, so it should be called a “biocide” rather than a “pesticide.” It doesn’t dissolve in water and remains in the environment for years, weakening ecosystems. DDT contaminates food by accumulating in fatty tissues, affecting human health by causing cancer and genetic damage. Carson published her findings in “Silent Spring,” a book that shocked the public and demanded the use of safe products to deal with pests. The chemical industry responded ruthlessly, even discrediting Carson personally. But many scientists supported her meticulous work. 🌍 Ten years later, the U.S. banned DDT as an agricultural chemical. However, Carson’s vision went beyond pesticides. She wanted society to control its impact on ecosystems and led a global environmental campaign based on facts, not just feelings. 🌱 #RachelCarson #SilentSpring #Environmentalism #DDT #ScienceHistory #Nature #Conservation #Education #learnsomethingnew A video by @scienseed4294 Ventana al conocimiento

Sara Josephine Baker was a strong girl who loved adventure. Growing up in New York in the late 1800s was not easy. When she lost her brother and father to typhoid fever, she became determined to pursue her dream of becoming a doctor. Find out what happens in this enchanting #videobook for children. *** SUBSCRIBE *** to our channel to watch more of our cool videobooks for kids: https://bit.ly/30SHjCo Dr. Jo: How Sara Josephine Baker Saved the Lives of America's Children is the charming and best-selling Children's Book by Monica Kulling. Buy the book and read along with your children! https://www.amazon.com/Dr-Jo-Josephine-Americas-Children/dp/110191789X/ In Jo's day, medical schools were closed to women, but times were changing, and Jo was at the forefront. When she graduated in 1898, Dr. Jo still faced prejudice against women in her field. Not many people were willing to be seen by a female doctor, and Dr. Jo's waiting room remained mostly empty. She accepted a job in public health and was sent to Hell's Kitchen, one of New York's poorest neighborhoods where many immigrants lived. There, she was able to treat the most vulnerable patients: babies and children. She realized that the best treatment was to help babies get a stronger start in life. Babies need fresh air, clean and safe environments, and proper food. Dr. Jo's successes, fueled by her determination, compassion and ingenuity, made her famous across the nation for saving the lives of 90,000 inner city infants and children. Click here to watch more great #Videobooks: https://www.youtube.com/playlist?list=PLj6DGFOX95y8s6jet3gF3FXhzXgxMQa11 This video was created by Videobooks By Wekom https://hippomottie.wixsite.com/123wekom *** SUBSCRIBE *** to our channel to watch more of our cool videobooks for kids: https://bit.ly/30SHjCo

Anthony Mason visits with actor Benedict Cumberbatch to talk about his role as mathematician Alan Turing in "The Imitation Game," a new film recounting Turing's heroic (and tragic) life story.

Were you fascinated by The Da Vinci Code? You might be interested in Cryptography! There are lots of different ways to encrypt a message, from early, simple ciphers to the famous Enigma machine. Michael Aranda takes you through a fun and cryptic episode of SciShow, all about codes! ---------- SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at http://www.scishowtangents.org ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out to Justin Ove, John Szymakowski, Fatima Iqbal, Justin Lentz, David Campos, and Chris Peters. ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow Or help support us by becoming our patron on Patreon: https://www.patreon.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow Sources: http://www.vectorsite.net/ttcode_04.html#m3 http://www.simonsingh.net/The_Black_Chamber/crackingprinciple.html http://book.itep.ru/depository/crypto/Cryptography_history.pdf http://www.cs.trincoll.edu/~crypto/historical/gronsfeld.html http://www.sans.org/reading-room/whitepapers/vpns/history-encryption-730 http://ftp.stmarys-ca.edu/jsauerbe/m10s11/chapter5.pdf http://www.turing.org.uk/scrapbook/ww2.html http://enigma.louisedade.co.uk/howitworks.html http://www.codesandciphers.org.uk/enigma/example1.htm http://www.pbs.org/wgbh/nova/military/how-enigma-works.html http://www.cs.miami.edu/~burt/learning/Csc609.051/notes/02.html

Sally Ride was the first American woman in space. She was a mission specialist on the seventh space shuttle mission and operated the shuttle’s robotic arm. Ride was known for her friendly and relaxed personality, but also her intense focus. She felt responsible for paving the way for women in space. Ride’s performance and skill, alongside her four male colleagues, made her a symbol of equality. See more stories like this on the Museum's official app GO FLIGHT.

Lynn Conway is a famed pioneer of microelectronics chip design. Computer Scientist Electrical Engineer Innovator Systems Architect Research Leader Engineering Educator Adventurer & Visioneer Conway grew up in White Plains, New York. She worked at IBM in the 1960s and is credited with the invention of generalised dynamic instruction handling, a key advance used in out-of-order execution, used by most modern computer processorsto improve performance. Conway was shy and experienced gender dysphoria as a child. Male to Female transition in 1968. Her innovations during the 1970's at the Xerox Palo Alto Research Center (PARC) have impacted chip design worldwide. Many high-tech companies and computing methods have foundations in her work. Thousands of chip designers learned their craft from Lynn's textbook Introduction to VLSI Systems, which she co-authored with Prof. Carver Mead of Caltech. Much of the modern silicon chip design revolution is based on her work. Lynn went on to win many awards and high honors, including election as a Member of the National Academy of Engineering, the highest professional recognition an engineer can receive. ~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~* https://www.transsingle.com - 100% Free Transgender Dating Site for MTF, FTM, Non-binary, Genderfluid and Transsexual People Who Are Looking for SERIOUS RELATIONSHIP. ▒░♥♫♪♣☻►▬▬▬ஜஜ۩۞۩ஜஜ▬▬▬◄☻♣♪♫♥░▒ +++ Subscribe and Watch Our Other Videos https://www.youtube.com/c/Transsingle-Transgender-Dating-Site

A brief video highlighting the life and work of Transgender Hero and Icon Dr. Alan L. Hart.