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  Aurora seen from space.

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  A 360° view from the surface of Mars from Perseverance Rover. 📸: NASA/JPL-Caltech/Simeon Schmauß

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  Thunderstorms seen from space.

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  The hummingbird hawk-moth (Macroglossum stellatarum) uses its long proboscis while hovering in midair to feed on flowers. 📽️: Mike Tyurin

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  Watch an iron nail get melted by 1000 amps of electric current, an example of Joule heating, where conductors resist current flow and release energy as heat, and why toaster elements glow and fuses blow. 📽️: Tavoromann | CC BY-SA 4.0

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  Metronomes started randomly synchronize after a short period of time as they influence each other through the side-to-side motion of their shared base. Source: UCLA Physics & Astronomy https://demoweb.physics.ucla.edu/content/160-spontaneous-synchronization

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  The "Screaming Gummy Bear" chemistry demonstration involves dropping a gummy bear into a test tube of molten potassium chlorate (KClO₃), where the sugar reacts violently with the released oxygen producing bursts of flame and gas. 📽️: DoktorKlawonn | CC BY 3.0

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  Spectacular timelapse of the Milky Way galaxy and a phenomenon known as airglow seen from the International Space Station. Credit: NASA Johnson

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  The fascinating way soap bubbles freeze. 📽️: Lorie Shaull | CC BY 2.0

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  Timelapse of a "Glory of Texas" cactus (Thelocactus bicolor) blooming. 📽️: Petr Vodička / CC BY-SA 4.0

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  This is what Earth looks like from 1.5 billion kilometers away. A pale blue dot beneath the rings of Saturn captured by the Cassini spacecraft. Credit: NASA/JPL-Caltech/SSI

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  These two photographs are separated by only 66 years.

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  The view from the International Space Station as an aurora meets the sunrise in space. Watch the full 4K widescreen version on Youtube: https://www.youtube.com/watch?v=YmK7oY-Xcr8

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  The speed of light visualized on a cosmic scale. Credit: @Physicsj

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  These rows are perfectly horizontal and are not moving. A mind-bending anomalous motion variation of the Café wall illusion by Akiyoshi Kitaoka. Source: http://www.psy.ritsumei.ac.jp/akitaoka/motion30e.html

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  A panoramic view from the surface of Mars captured by Curiosity rover. Credit: NASA/JPL-Caltech/MSSS Source: https://mars.nasa.gov/resources/21468/wide-angle-panorama-from-ridge-in-mars-gale-crater/

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  Zoom in on the Andromeda Galaxy with Hubble. What looks like a smudge of light to the unaided eye is actually a vast galaxy containing an estimated 1 trillion stars. Credit: ESA/Hubble & NASA

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  These boxes are not moving. A mind-bending optical illusion by Japanese artist Jagarikin.

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  The amazing golden color of these scarab beetles (Chrysina resplendens) is not a result of pigmentation or actual metal, but ≈70 microscropic chitin layers of decreasing thickness that reflect light to produce a metallic effect. Video credit: insecthaus_adi/ig Source: https://www.instagram.com/p/BVaHvmIhjbb/ Further reading: https://www.eurekalert.org/news-releases/882153

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  Time-lapse of the Sun circling the horizon at the South Pole during early March. Video credit: Robert Schwarz Source: https://vimeo.com/208466944

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  Saturn's heavily cratered moon Tethys slipping behind atmosphere-shrouded Titan captured by the Cassini spacecraft. Credit: NASA/JPL/SSI Source: https://solarsystem.nasa.gov/resources/14811/tethys-slips-behind-titan/

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  Spectacular timelapse capturing an entire night from sunset to sunrise over the ALMA Observatory on the Chajnantor Plateau in the Chilean Atacama Desert. Video Credit: ESO/C. Malin (christophmalin.com)

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  The LI-900 silica tiles used on the Space Shuttle were such poor heat conductors you could grab them with bare hands seconds after pulling them from a 2200 degree oven. Source: http://bit.ly/2I7k683

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  Every second, the Sun ejects 1.5 million tons of material into space at hundreds of miles per second, but Earth's magnetic field protects it from the solar wind. Credit: NASA Goddard

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  A timelapse showing the incredible movement of a growing vine, exhibiting both nastic movement to find, and then a thigmotropic response to grasp and hold. Credit: Roger P. Hangarter

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  A ladybird beetle spreading its wings captured with a high-speed camera. In real-time wing deployment from the fully folded state takes less than 0.1 seconds. Video credit: University of Tokyo / Saito et al. 'Investigation of hindwing folding in ladybird beetles.' DOI: 10.1073/pnas.1620612114. https://www.pnas.org/doi/full/10.1073/pnas.1620612114 #nature #photography #science

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  Astronaut Alan Bean enjoying weightlessness in the open space of the orbital workshop on the Skylab space station in 1973. #nasa #space #science

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  Curiosity Rover spotted on the surface of Mars by the orbiting MRO spacecraft. Credit: NASA/JPL/UoA

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  An owl gliding through a cloud of helium-filled soap bubbles reveals wingtip and tail vortices. Video credit: Usherwood et al. Source: https://journals.biologists.com/jeb/article/223/3/jeb214809/223686/High-aerodynamic-lift-from-the-tail-reduces-drag

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  These incredible ibex defy gravity climbing a near-vertical dam in search of nutritious salt. Video credit: BBC