Search results for “1945-1991”
Blood Vessels Help Tumors Grow
This video segment adapted from NOVA, features cancer researcher Dr. Judah Folkman and describes his approach to proving a new idea he had about how tumors grow inside the body. His idea focuses on angiogenesis, the formation of new blood vessels. Dr. Folkman designed experiments to test his central
Swift: Gamma-Ray Bursts
In the late 1960s, scientists accidentally discovered gamma-ray bursts — intense flashes of energy that typically last no more than a few minutes and are often as short as a fraction of a second. For decades after the discovery of these powerful bursts, they remained one of the greatest mysteries in
Earth System: Drought and Air Quality
Droughts claim more victims each year than any other natural disaster. Depending on where it occurs and how long it persists, the cost of a drought can run into the billions of dollars. Droughts cause more than economic hardship, however. As this video segment adapted from NASA's Goddard Space Fligh
United Nations Day
United Nations Day, on 24 October, marks the anniversary of the day in 1945 when the United Nations was formed as the UN Charter came into being. Our video raises awareness of this day, celebrated every year, to reaffirm the purposes and principles of the UN Charter. #UN #UnitedNationsDay Transcrip
8 Signs You're Being Lied To
Are you wondering how to spot a liar? Do you suspect that your friend is lying to you? It can be frustrating when our friends aren’t completely honest or upfront with us, especially about the things that matter, so sometimes we have to figure out for ourselves whether or not they’re telling the trut