First Lady Michelle Obama stopped by The Ellen DeGeneres Show this week and, knowing Ellen is a big fan of dancing, challenged the comedian to learn the #GimmeFive dance to help mark the fifth anniversary of her healthy life campaign Let's Move! Watch the two break it down to "Uptown Funk,"

President Barack Obama addressed the United Nations on climate change at the UN Climate Change Summit on September 23, 2014 in New York.

This animation shows the GOES-East infrared imagery from April 1-30, along with the locations of each tornado that formed during the time (symbolized as red dots). Though tornadoes cannot actually be seen by GOES, these satellites are instrumental in being able to detect the conditions associated wi...

It is 1939 and Europe is on the brink of war. Hitler has invaded Czechoslovakia, threatening the lives of the Jewish population. Nicholas Winton, a young British stockbroker, decides he will do everything possible to save the lives of as many Jewish children as he can. This film, transmitting on Hol...

The Florida Reef Tract is the third largest coral reef in the world and a vastly important ecosystem for sustaining underwater life. Scientists are working to combat the crisis in the world’s coral reefs—that is, that human beings have lost 25 to 40 percent of the world’s corals in recent decades du

All voices and lyrics by Daniel Emmet. Goodbye Corona - an opera for hope in 2021 to return back to normality.

A whale lunge feeding right next to the Kayak, plus some underwater footage. While the lunge feed was heart pounding excitement while kayaking next to the blue whales in Redondo Beach California. It was relaxing and peaceful.

Video from the highest point of the tide on the south shore of long island. Surge was about 4 to feet. No water in my house but my garage was flooded and many of my neighbors south of my house were flooded also. The boats where fine.

As of September 21, 2017, the death toll from the massive earthquake in Mexico is rising, but there are glimmers of hope amid the devastation: More survivors are being pulled from the rubble nearly two days after the quake struck. NBC’s Miguel Almaguer reports for TODAY from Mexico City.

The disappearance of the Mayan Empire is all the more mysterious because it happened not once, but twice. The earliest civilization that took root during the heart of antiquity prospered for hundreds upon hundreds of years, with innovations that rivaled those of Egypt. Unlike the Egyptians and Mesop...