1901
Why does the yolk of an overcooked hard-boiled egg become green? It's because every egg yolk contains iron, which is released when the egg is heated long enough
[read more: ow.ly/riQj30nNwFs]
1902
Richard Feynman's Lectures on Physics are timeless: their main strength is in demonstrating how to reason about physics. You may not know all the lectures are completely online:
Volume 1: feynmanlectures.caltech.edu/I_toc.html
Volume 2: feynmanlectures.caltech.edu/II_toc.html
Volume 3: feynmanlectures.caltech.edu/III_toc.html
1903
Phelsuma is a large genus of geckos in the family Gekkonidae. Species in the genus Phelsuma are commonly referred to as day geckos
[read more: buff.ly/3UMULUN]
[📹 Maya Rosal: buff.ly/3UMULUN]
1904
«The Black Hole» is an international prize winner short film directed by Olly Williams and Phil Sansom that offers a portrait of temptation and greed from a genuinely sci-fi point of view
[video, HD: buff.ly/3Euc9YF]
1905
An amazing light show captured in the redwoods forest in California.
[📷 Mitch Crispe: buff.ly/3tqFZqI]
1906
Amethyst is a purple variety of quartz (SiO₂) and owes its violet color to irradiation, impurities of iron and in some cases other transition metals, which result in complex crystal lattice substitutions
[read more: buff.ly/3E2pg1M]
1907
Scallops have a well-developed nervous system, and unlike most other bivalves, all scallops have a ring of numerous simple eyes situated around the edge of their mantles
[read more: buff.ly/2INsyMk]
1908
Elephant tusks are starting to get smaller and in the future more elephants will be without them, because member of the species with a rare “tuskless” genetic trait had a better chance of surviving poachers
[read more: buff.ly/3fuoKLE]
1909
The Sart Canal-Bridge in Belgium is 498 m long and was built with 65,000 tons of concrete capable of transporting 80,000 tons of water allowing the navigation along the waterway's sides it connects
[read more: buff.ly/3sATGjZ]
1910
A tsunami of clouds: this is actually a Kelvin-Helmholz-like cloud captured by photographer Mike Hollingshead during the passage of a supercell in Nebraska
[source: buff.ly/2kspCWY]
1911
When a very viscous liquid like honey is poured, a growing column of liquid coils begin to emerge from above the surface of the honey in an effect referred to as the liquid rope-coil effect. Here's a really detailed explanation of the phenomenon: buff.ly/34Lvgsh
1912
The BMW Iso Isetta was the top-selling single-cylinder car in the world, with 161,728 units sold
[read more: buff.ly/2J6jGAW]
[📹, Petrolicious: buff.ly/2JcGVtj]
1913
Why do people often stick their tongue out when they are concentrating on something? It turns out much of your brain is devoted to your tongue and sticking it out or biting it leaves more brain-power available to concentrate
[source: ow.ly/pUSQ30nOIs7]
1914
Earth is the only planet in our Solar System where fire can exist. In fact, while we know about a lot of hot things existing in the universe, Earth is the only known celestial body that has enough oxygen to support a combustion
[read more: buff.ly/3pKKiMv]
1915
This rainbow with a rainshaft was observed by Jared Rackley on May 27, 2014 during a NOAA storm chasing session in Carr Colorado
[source, NOAA Photo Library: ow.ly/TQZA50AR2J2]
1916
This rock is a narrow vertical 9 meter high column of basalt hanging on on cliffs overlooking St. Mary's Bay on the Bay of Fundy. No one knows for sure how long it has been like this but it could be thousands of years [read more: ow.ly/DbMB30nMqsW]
1917
The “Dance of the thousand-hand Quanyin” is possibly the most famous and most spectacular visual display in which geometry and synchronization create a kind of effective optical illusion [read more: buff.ly/3EJ3xKr] [video: buff.ly/3Hq61iD]
1918
A samara is a winged achene, a type of fruit which enables the wind to carry the seed farther away from the tree than regular seeds would go. This is called anemochory
[read more: buff.ly/3JyHwS5]
[Shorea siamensis, clip by Tomoki SANDO]
1919
The Mandelbulb is a 3-dimensional fractal that can be constructed as a Mandelbrot set in 4 dimensions using quaternions and bicomplex numbers. This is one spotted in the wild
[source + tutorial by Machina Infinitum: buff.ly/3RQoACG]
1920
Fallout from nuclear bomb tests in the 1950s & '60s is showing up in US honey. The findings reveal that thousands of km from the nearest bomb site and more than 50 years after the bombs fell, radioactive fallout is still cycling through plants and animals buff.ly/3tGTMIa
1921
It's something temporary, but the Moon is 1/400th the size of the Sun & also 1/400th the distance from Earth which results in the Moon and the Sun being the same size in the sky, a coincidence not shared by any other known planet-moon combination [source: buff.ly/2xm2qDe]
1922
The decisive moment when a kingfisher dives in water to hunt fish, has been superbly captured in this award winning photo by Chris Chambers [source: buff.ly/2GUCgGY]
1923
The magnitude of difference between 1 million and 1 billion is not that intuitive and can be illustrated with this example of the time scale:
- A million seconds is 12 days.
- A billion seconds is 31 years.
- A trillion seconds is 31,688 years
ow.ly/5vsP30mJT8e
1924
What a 1300 years old tree can tell us: this is only the final part of the Mark Twain tree's story
[read more: buff.ly/2qT07lU]
1925
The lava formations you can spot at West Kamokuna Skylight, HI look like Dante's damned soul sliding into hell
[source, read more: buff.ly/2kk2nAA]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links