Mars - Valles Marineris
Animation of a flight over Mars, passing over the extensive Valles Marineris canyon system. This is an extensive system stretching some 4000 kilometers and reaching 200 kilometers wide and seven kilometers deep.
© Mark Garlick / Science Source
ScienceSource.com image ID: SS1413448
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Copper Reacts with Silver nitrate.
Copper is immersed into a 0.2M solution of silver nitrate (AgNO3).
Since copper is more reactive than silver, a single-displacement reaction occurs: Cu + AgNO3 -> Ag + Cu(NO3)2.
Formation of silver metal (Ag) is clearly visible.
As reaction progresses, the solution becomes slightly bluish due to Cu2+ ions.
Time-lapse Video:
Penny - 45 minutes
Straight wire - 36 minutes
Spiral wire - 24 minutes
Wire in beaker - 40 minutes
© Turtle Rock Scientific / Science Source
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ScienceSource.com image ID's: SS1411807, SS1411818, SS1411829, and SS1411840
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Gravitational Lensing
Gravitational lensing is the effect in which the image of a distant object is distorted by the gravitational field of an object in front of it. Initially, a distant galaxy is at the top, and the Earth at bottom. Diverging light rays from the galaxy are shown in white. If a massive object is placed in the middle, relativity predicts that the light will be bent towards the mass, in effect focusing it on Earth like a converging lens. Different arrangements produce slightly different effects. A single large mass can produce a ring with a bright central spot or multiple images forming a cross. When the lensing object is a massive cluster of galaxies, images of the more distant galaxy are likely to be smeared into thin irregular arcs.
ScienceSource.com image ID: SS220023
Credit: M. Kornmesser/Lars Lindberg Christensen/ESA/Hubble/ SPL/Science Source
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Gravitational Lensing
Gravitational lensing is the effect in which the image of a distant object is distorted by the gravitational field of an object in front of it. Initially, a distant galaxy is at the top, and the Earth at bottom. Diverging light rays from the galaxy are shown in white. If a massive object is placed in the middle, relativity predicts that the light will be bent towards the mass, in effect focusing it on Earth like a converging lens. Different arrangements produce slightly different effects. A single large mass can produce a ring with a bright central spot or multiple images forming a cross. When the lensing object is a massive cluster of galaxies, images of the more distant galaxy are likely to be smeared into thin irregular arcs.
ScienceSource.com image ID: SS220023
Credit: M. Kornmesser/Lars Lindberg Christensen/ESA/Hubble/ SPL/Science Source
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Bee Stings!
After the stinger is embedded in the skin, the bee moves away, leaving the barbed stinger within the skin. The tiny muscles of the venom apparatus still pump venom into the skin after the bee has left.
Video clips: © Scott Camazine / Science Source
Still images 1 and 2: © Ted Kinsman / Science Source
Still image 3: © Scott Camazine / Science Source
Music: "Need for speed" by Arulo (mixkit.co)
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Going, Going, Gone!
Didinium eating Paramecium
Composite clip of Didinium nasutum attacking and ingesting a Paramecium. Didinium nasutum is a one-celled, barrel-shaped ciliate characterized by two bands of cilia around its body. It is commonly found in bodies of fresh or brackish water, where it is a voracious predator of its main food source, the much larger unicellular ciliate Paramecium. Didinium attacks and engulfs its prey and digests it within a few hours, ready to hunt again. Composite of color enhanced scanning electron micrographs (SEM).
© Greg Antipa / Science Source
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"Rain Dance"
A Herring Gull hunts for worms by stamping on the ground with its feet. The stamping produces vibrations that mimic the sound of raindrops. The sound of the “raindrops” entices the worms to crawl to the surface.
Video: Herring gull (Larus argentatus) hunting for worms, stamping on ground with feet, Ceredigion, Wales, UK, November.
© Dave Bevan / NaturePL / Science Source
Music: "Cherry on Top"
by Michael Ramir C. (mixkit.co)
ScienceSource.com image ID# SS21943031
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Sneezing... Schlieren Photography
Video of man sneezing at regular speed, in reverse, and in slow motion.
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https://www.sciencesource.com/archive/Video/Silhouette-of-man-sneezing-SS26886.html
The visual technique used here is Schlieren Photography. Schlieren are optical variations (inhomogeneities) in transparent media that are not necessarily visible to the human eye. Schlieren physics developed out of the need to produce high-quality lenses devoid of such inhomogeneities. This imaging technique in this video uses the variations in the index of refraction of the air to show how the air moves due to the sneeze.
© Gary S. Settles / Science Source
ScienceSource.com ID# SS26886
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360 Degree Aurora Borealis (Northern Lights)
A 360 degree aurora borealis (northern lights) all sky display, looking straight up through the black spruce trees toward the Big Dipper's handle in the White Mountains of Alaska. Canon 6D DSLR Camera & 8mm Rokinon Fish-eye Lens set to F3.5, ISO 3200, 6 second exposures, with 1 second delay. The time-lapse was captured for 4 hours (this video is doubled with he second half in reverse). Images were captured from 11:30 pm on March 31, 2022 until 03:37am on April 1, 2022. Earth had been hit by several M-class Solar Flares & Solar Coronal Mass Ejection event that night, which made the aurora so fantastic to watch.
ScienceSource.com ID# SS1385119
© John Chumack / Science Source
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Music: "Relax Beat" by Arulo (mixkit.co)
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Silver Chromate Precipitate
Silver chromate (Ag2CrO4) precipitate (bright red) formed by adding 0.25 M solution of silver nitrate (AgNO3) to 0.15 M solution of potassium chromate (K2CrO4). The reaction is K2CrO4 + AgNO3 -> Ag2CrO4 + KNO3. This is an example of a double replacement reaction.
© Turtle Rock Scientific/Science Source
ScienceSource.com image ID# SS121993
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Cannabis Leaf with Trichomes
Scanning electron micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
© Ted Kinsman/Science Source
ScienceSource.com image ID# SS21595317
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Hair Raising! - "Piloerection"
Close-up of fine hairs on a human arm rising and falling. Skin hairs rise in response to stimuli including cold, fear and awe. Technically known as piloerection, it is produced by the contraction of a small muscle (the arrector pili) at the base of each hair.
© SPL Motion / Science Source
ScienceSource.com ID# SS277212
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Music: "Also sprach Zarathustra" by Strauss
Kevin MacLeod (Creative Commons Attribution 3.0 Unported license)
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