Wikipedia Picture of the Day - March 5th, 2024 - Dyeing poison dart frog (Narrated by Salli) The dyeing poison dart frog (Dendrobates tinctorius) is a species of poison dart frog. It is among the largest species, reaching lengths of 50 millimetres (2.0 in). It is distributed throughout the eastern portion of the Guiana Shield, including parts of French Guiana, Guyana, Suriname and Brazil. This dyeing poison dart frog was photographed in the Karlsruhe Zoo in Germany. Photograph credit: H. Zell Source: https://en.wikipedia.org/wiki/Template:POTD/2024-03-05 This video was auto generated using data and media from Wikipedia. ... https://www.youtube.com/watch?v=NzPaOiHuvA0

Astronomy Picture of the Day - March 11th, 2022 - When Rainbows Smile (Narrated by Brian) Want to see a rainbow smile? Look near the zenith (straight up) when the sun is low in the sky and you might. This example of an ice halo known as a circumzenithal arc was captured above a palm tree top from Ragusa, Sicily on February 24. The vividly colorful arcs are often called smiling rainbows because of their upside down curvature and colors. For circumzenithal arcs the zenith is at the center and red is on the outside, compared to rainbows whose arcs bend toward the horizon after a downpour. True rainbows are formed by water droplets refracting the sunlight to produce a spectrum of colors, though. Circumzenithal arcs are the product of refraction and reflection in flat hexagonal ice crystals, like the ice crystals that create sundogs, formed in high thin clouds. Image Credit & Copyright: Marcella Giulia Pace Source: https://apod.nasa.gov/apod/ap220311.html This video was auto generated using data from NASA Open API. ... https://www.youtube.com/watch?v=sCtM9cAuYDw

Wikipedia Picture of the Day - May 31st, 2020 - Hybrid-propellant rocket (Narrated by Emma) A hybrid-propellant rocket is a rocket with an engine that uses propellants in two different phases, one solid and the other gaseous or liquid. The concept can be traced back to at least the 1930s. This picture shows a transparent 3D-printed hybrid-rocket fuel grain with dual helical fuel ports, a post-combustion chamber, and a de Laval nozzle, photographed prior to the hot-fire test. The motor used nitrous oxide as the oxidizer and Pyrodex pellets for the igniter. Photograph credit: Matt Steiner and Kees08 Source: https://en.wikipedia.org/wiki/Template:POTD/2020-05-31 This video was auto generated using data and media from Wikipedia. ... https://www.youtube.com/watch?v=BoA_9KTDUtw

Astronomy Picture of the Day - June 3rd, 2023 - Charon: Moon of Pluto (Narrated by Emma) A darkened and mysterious north polar region known to some as Mordor Macula caps this premier high-resolution view. The portrait of Charon, Pluto's largest moon, was captured by New Horizons near the spacecraft's closest approach on July 14, 2015. The combined blue, red, and infrared data was processed to enhance colors and follow variations in Charon's surface properties with a resolution of about 2.9 kilometers (1.8 miles). A stunning image of Charon's Pluto-facing hemisphere, it also features a clear view of an apparently moon-girdling belt of fractures and canyons that seems to separate smooth southern plains from varied northern terrain. Charon is 1,214 kilometers (754 miles) across. That's about 1/10th the size of planet Earth but a whopping 1/2 the diameter of Pluto itself, and makes it the largest satellite relative to its parent body in the Solar System. Still, the moon appears as a small bump at about the 1 o'clock position on Pluto's disk in the grainy, negative,telescopic picture inset at upper left. That view was used by James Christy and Robert Harrington at the U.S. Naval Observatory in Flagstaff to discover Charon in June of 1978. Source: https://apod.nasa.gov/apod/ap230603.html This video was auto generated using data from NASA Open API. ... https://www.youtube.com/watch?v=mdWKaRN7gmE