51
Population growth from 10,000 BCE to today
[video by Robert Rohde, HD: buff.ly/3egX55U]
52
The impressive molt of a cobra mantis (Choeradodis rhomboidea)
[📹 kripticantids: buff.ly/3IlCvhA]
53
This TikTok user DYE2UXZJ3P9W made several slow motion videos of water balloons popped through various objects resulting in spectacular fluid motion effects, like this water flower
[more videos from Best of Tiktok: buff.ly/3m6VA9H]
54
The story of Hisako Koyama, the solar observer who hand drew more than 10,000 solar sketches for more than 40 years. Her work was one of the most influential solar observation collections in the last 400 years, shaping solar science & modern space weather buff.ly/3siY4qZ
55
Preikestolen (English: «Pulpit Rock'») is a tourist attraction in Rogaland county, Norway. Preikestolen is a steep cliff which rises 604 meters (1,982 ft) above the Lysefjorden
[read more: ow.ly/mPPE50ukEN3]
[📹 buff.ly/3iczpBX]
56
The ocean sunfish is the world's heaviest known bony fish: it reaches up to 2,300 kg of weight & 4.2 meters of size across the fins
[read more: buff.ly/2p3FDYk]
[video: buff.ly/2PTq3fA]
57
A Petoskey stone is a rock and a fossil, often pebble-shaped, that is composed of a fossilized rugose coral, Hexagonaria percarinata. Such stones were formed as a result of glaciation, in which sheets of ice plucked stones from the bedrock
[read more: buff.ly/2tXbhGo]
58
Thes story of the anti-tank grenade football invented by the US Army in 1973. It was made to be the same weight and shape of a football because soldiers would already be familiar with throwing it
[read more: buff.ly/3Cpr84v]
59
The Veluwemeer Aqueduct in Harderwijk, The Netherlands, is a 25-meter long water bridge and an architectural beauty, allowing 28,000 vehicles to pass under it daily
[read more: bit.ly/2xCKvnP]
[📹 buff.ly/3IvofCW]
60
In 2019, Travis Casagrande created the world's tiniest gingerbread house, by using an electron microscope at the Canadian Centre for Electron Microscopy. It could easily stay on top of a single human hair
[read more: buff.ly/2PJ45tz]
61
In Northern Hemisphere we're right in the middle of winter, but Earth is actually at its closest position to the Sun #Today at 16:17 UTC and we're 5 million km closer to the Sun now than we are in early July
[read more: buff.ly/3qTubLl]
#HappyPerihelion
62
The octopus is known for being the ocean's master of disguise. Yet, not always its tricks are the winning ones.
[📹 Steve Winkworth + info: buff.ly/3Q9xnPD]
63
Seals usually attack their prey by bringing it to the surface and slamming it against a hard surface. So, being slapped by a seal with an octopus while kayaking does not necessarily represent adverse karma
[📹 Taiyo Masuda: buff.ly/3vAbwr9]
64
The Logarithmic Spiral Gears is an extreme example of non-circular gear sets. It's based on the famous Fibonacci spiral and evokes the cross section of a nautilus shell with internal chambers
[source, read more: buff.ly/3obaPPN]
65
"Confusing perspective"
[📹 Larry Carlson: buff.ly/3qaubXW]
66
Humpback whales create ‘bubble nets’ to snare their prey, sometimes with Fibonacci spiral patterns as showed in this clip by Richard Sidey. Researchers think the spiral patterns have advantages over circular ones
[full paper: buff.ly/3OdpN5f]
67
Lightning produced by an avil clouds is sometimes called a 'bolt from the blue' because it can occur in seemingly cloudless skies. It comes actually from the cloud's higher parts, arcing way to hit the ground
[📹 Hussainy Salah, Florida, July 2019]
68
There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery
— Enrico Fermi
buff.ly/3GeEIZt
69
Selfie shark.
Or how cinematographer Nicolas Zimmermann had his ring camera eaten by a tiger shark, retrieved the camera and got this clip of the interior of a shark's mouth
[source, full story: buff.ly/3vwUDgY]
70
The exploding whale. The weird story of when Oregon authorities decided that the best way to dispose of a whale carcass was to blow it up with half a ton of dynamite, causing blubber to rain down everywhere
[read more: buff.ly/3vSaTJP]
71
Flame polishing is a method of polishing a material, usually glass or thermoplastics, by exposing it to a flame or heat.When the surface of the material briefly melts, surface tension smooths the surface
[read more: buff.ly/3WINXs1]
72
Artificial reefs proved to be an effective way to sustainably improve fisheries’ productivity. This is how one built in Little Abaco is full of white grunts, lobster, and more after 6 months
[learn more: buff.ly/3GDmTFb]
73
After months of chasing starlings, photographer James Crombie captured this remarkable shot of the flock as it swelled into an enormous bird-like murmuration
[read more, author's site: inpho.ie]
74
A bacterial flagellum is driven by a rotary engine made up of protein, and is powered by the flow of protons across the bacterial cell membrane. It rotates at ~1,000 rpm, but the rotor alone can rotate at up to 17,000 rpm
[📹 smart-biology.com]
75
There's a lighthouse in Iceland that sits on the highest of three rocks six miles off the Icelandic coastline, built in 1939 on top of an extremely steep and dangerous rocky cliff. It's the the Þrídrangar lighthouse
[read more: buff.ly/2CIFFLv]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links