1626
This image illustrates the observable universe on an increasingly compact scale, with the Earth & Sun at the center surrounded by our Solar System, nearby stars, nearby galaxies, distant galaxies, filaments of early matter & the cosmic microwave background buff.ly/2rqxuv2
1627
The story of the swimmers saved from a great white shark by a pod of dolphins who did tight circles around them to create a barrier. The dolphins kept this up for 40 minutes until the shark lost interest and was safe for the swimmers to swim to shore: buff.ly/2E4Rm17
1628
Owls bob and weave their heads to improve their depth perception. An owl’s eyes are in fact fixed in position. The owl’s varied head movements help it judge the position and distance of things around it — essentially, to triangulate on objects [read more: buff.ly/2FVePwT]
1629
The spiral pump, first invented in 1746 by H.A. Wirtz, with its low torque requirements, can be used to provide water without the need for fuel wherever there is a flowing stream or river
[read more buff.ly/3fHJgMj]
[video by Milan Vitéz: buff.ly/3fCVxBS]
1630
«At first all plates seem upside-down, once you see one that is straight up all the other ones will show straight up too».
This is due to your unconscious expectation to see objects illuminated from above
[read more: ow.ly/wgM530nBF4b, ow.ly/hZPE30nBF4F]
1631
In 1418 Filippo Brunelleschi was tasked with building the largest dome ever seen at the time. He had no formal architecture training. Yet experts still don't fully understand the methods he used in contructing the dome of Santa Maria del Fiore in Florence buff.ly/3dsJIdg
1632
An Air Force F-22 Raptor executes a transonic flyby over the flight deck of the aircraft carrier USS John C. Stennis (CVN 74)
[source, photo by Kyle Steckler: buff.ly/2KigVcS]
1633
This is what you obtain if you take a long exposure photo of bugs under a streetlamp
[source, by Charlie McCarthy: ow.ly/Lok330nAtJU]
1634
This is what an fluorescent uranium ore looks like: it absorbs ultra-violet light and it reradiates it as visible light [full video and explanation by Veritasium: buff.ly/2Ih9q8H]
1635
Watch a giant pacific octopus kill a shark. Even though it is a spiny dogfish shark (never larger than 1.5 m in length) and the scene takes place in an aquarium tank, it's always an impressive event
[source and full video, National Geographic: ow.ly/K6Es50kK3Fh]
1636
This 3D printable gadget uses the geometry of nested hexagon plastic shapes with some magnets, to create a remarkably satisfying toy
[3D model description: buff.ly/30sZgsi]
1637
Sleeping in space is an important part of a mission, with impacts on the health, capabilities & morale of astronauts and it's not easy. Even the posture, due to micro gravity, ends up by looking totally unnatural as shown in this Shuttle footage [source: buff.ly/2p9DwmT]
1638
On December 10, 1985, the Senate Environment and Public Works Subcommittee held a hearing to discuss how the greenhouse effect might change the global climate system and possible solutions
This is Carl Sagan testifying
[full 📹: buff.ly/3Mi40si]
1639
This video is a majestic visualization of the toroidal structure and flow of a smoke ring
[detailed scheme: buff.ly/3EBZhzQ]
[physics: buff.ly/3CcOcmc]
[📹 Titus Edwards: buff.ly/3elWaBB]
1640
Plants do actually move: we just don't live in the same time reference frame.
This 2-day time lapse shows the so called plants' nastic movements, mostly due to changes in turgor or changes in growth
[📹 Katie Parky: buff.ly/3V9GlyB]
1641
Eggplant tastes like something you’d think of as a veggie, but it’s technically a kind of fruit. And more specifically, it's a berry by botanical definition. Here's a time-lapse from seed to eggplant in 87 days
[📹 Boxlapse: buff.ly/3T9V3n8]
1642
The brown long-eared bat has distinctive long ears but it doesn't use echolocation, preferring to visually detect prey. This is a baby specimen, Cruella, found in Somerset in 2010
[📷Richard Austin, read more: buff.ly/3VaXcRu]
1643
There’s an entire mountain range in Antarctica, similar to the size of the Alps, that no one has ever seen because it’s completely covered by ice [read more: buff.ly/3Cn1JaX]
1644
Jupiter has 80 known moons in a wide range of sizes and shapes. This video compares their size using Manhattan, NYC and part of the New York state as a reference
[full video, HD, MetaBallStudios: buff.ly/3fPMm38]
1645
2D Artist Vaskange uses Endless Paper app and Apple Pencil, powered by Fractile, a vector rendering engine, creating illustrations that can be infinitely zoomed in
[Instagram: buff.ly/3RHAlKt]
1646
There's a place in Morocco where you can find goats perching on these trees' branches. Yes, goats on trees
[read more: bit.ly/1D4GlVG]
[📹 Photo Workshop Adventures: buff.ly/3unuvlV]
1647
Osaka, Japan, has three major arched flood gates. In case of need, the arch shape floodgate lowers towards the upstream side. The whole process takes about 30 minutes [full video: buff.ly/2PRSXNu]
1648
Static grass applicators use relatively high voltage (40,000 V) to apply and recreate realistic grass in diorama and model railroads
[video example: buff.ly/3Co72XL]
[📹 Model Railroad Hobbyist]
1649
This scanning electron microscope picture shows a nerve ending. It has been broken open to reveal vesicles (orange and blue) containing chemicals used to pass messages in the nervous system. The picture was captured by Tina Carvalho [source: ow.ly/3FAy50wTBnk]
1650
There's a point in South America where three countries borders meet in the so called Triple Frontier [read more: buff.ly/2qitcqG]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links