Neurologist and author Oliver Sacks brings our attention to Charles Bonnett syndrome -- when visually impaired people experience lucid hallucinations. He describes the experiences of his patients in heartwarming detail and walks us through the biology of this under-reported phenomenon.

President Obama delivers remarks at COP21 in Paris on the global community's need to address the threat of climate change. November 30, 2015.

The difference between how hashtags are used on social media platforms like Twitter, Instagram and Facebook will affect your (business) social media strategy. We try to explain the use of hashtag in social media in this video.

Matthew Liao, Director of the Bioethics Program at New York University believes that soon, neuroscientists will be able to use drugs to selectively erase traumatic memories from the brain. NYU bioethicist Matthew Liao thinks we should have the right to modify memories to improve our well-being.

Learn about the differences between cancerous cells and healthy blood cells.

A lip sinking music video of drag queen performing We'll Meet Again by Vera Lynn.

Northern Lights as seen east of Martin, Michigan on October 24 2011. As seen on numerous local broadcasts and local news outlets around the midwest. The timelapse spans 2h 20m from just after dusk to around 10:30 pm EDT.

"When we try to pick out anything by itself, we find it hitched to everything else in the Universe." - John Muir When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable "trophic cascade" occurred. What is a trophic ca...

Video showing the aftermath of superstorm sandy from the air. Show your love for Fire Island!

This double rainbow was captured by CommunityofLights.com on a late summer afternoon in 2010. The sun was setting and a short rain shower was passing by the Miami skyline.