With the Goal of Scientius

Whether physics, biology, earth or natural science, chemistry, etc; All sciences should be found here. "Scientius" - Latin, to be made of knowledge

[joffysloffy]

I made a thing!

One point simply rotates around the origin (over the dotted circle). The other four points are attached to the smaller circle centered at the aforementioned point. The smaller circle rolls inside the bigger circle, while the four points actually just move in a straight line.

[subatomiconsciousness-deactivat]

If you are standing at the North Pole and walk straight south to the Equator, turn through 90° and walk east the same distance you have just walked south, and then turn through 90° and walk that distance once more, you will be back at the Pole, and have walked out a giant triangle—with internal angles adding up to 270°

[…]

there is nothing special about Euclidean geometry: in spite of its enduring popularity and elegance, there was no reason to choose it over any other self-consistent geometric system.

However, I seem to be stuck firmly in the early twentieth century: I am concerned that there is something a little bit special about Euclidean geometry. That something is that the properties of shapes do not vary depending on how big you draw them—a quality called ‘scale invariance’—whereas in other systems of geometry, they do.

So what on Earth does that mean? Well, imagine you’re on Earth, stood at the North Pole, and you want to draw a circle. You tie a rope around the pole (there is an actual pole at the Pole, right?), tie a pencil to the other end, walk far enough away that the rope goes taut, and then turn through 90°, put your pencil to the floor, and draw your giant circle.

For a normal circle, we know the circumference, c = 2πr, where r is the circle’s radius and π = 3.14159265358979…, which mathematicians have worked out to more decimal places than I care to reproduce here. What about on the surface of a sphere?

Imagine your string was long enough that you could walk to the equator—a quarter of the circumference C = 2πR of the Earth. The circumference of your circle is then C—the circumference of the Earth—because you’ll have to walk around the whole Earth to finish your circle. Let’s try to apply our favourite formula: I’ll call it c = 2π′r, this time;π′ because I’m worried the answer won’t just be π any more.

C = 2π′C/4

   C = π′C/2

   π′ = 2

Damn! The value of π′ seems to have changed.

… to be continued

[matthen]

Visualising numbers (100, 243 and 12) by splitting them into all possible factorisations. [code]

[thelifeofamedstudent]

Knowing the 20 Amino Acids is definitely a MUST for the 2015 MCAT 

Amino acids that are usually negative (i.e. de-protonated) at physiological pH:

- Glutamate (E) Glu, and Aspartate (D) Asp

Amino acids that are usually positive (i.e. protonated) at physiological pH:

- Lysine (K) Lye, Arginine ® Arg 

Histidine is sometimes charged at physiological pH. 

physiological pH = 7, Neutral 

[astronomicalwonders]

“Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let them live. In a hundred billion galaxies, you will not find another.”   ~ Carl Sagan, Cosmos

[mirandamolina-deactivated202002]

The Trammel of Archimedes / Compás de Arquímedes

[scientius]

The evolution of the universe can be likened to a display of fireworks that has just ended: some few wisps, ashes, and smoke. Standing on a well-chilled cinder, we see the fading of the Suns, and try to recall the vanished brilliance of the origin of the worlds

Georges Lemaître, Belgian priest and past president of Pontifical Academy of the Sciences

[hamoid-deactivated20240228]

Draw a cube. For each new cube, draw two smaller, displaced, rotated cubes. Repeat until size is too small.

Source code for Processing

[shortvideosandstuff]

Hugh Herr: The new bionics that let us run, climb and dance

[algaecomplex]

oh my god they did it!

[lehanan-aida]

This is probably the most impressive and beautiful thing I’ve seen in years.

[chicanaspice-deactivated2018011]

This is amazing. As much as i joke about wanting new legs, I hope this gives amputees much wanted freedom.

[mothernaturenetwork]

Check out one of our favorite stories from last year.

Endangered bird hatches from egg held together with glue, tape From repairing crushed eggs to developing alluring perfumes that encourage breeding, conservationists are determined to save New Zealand’s rare kakapo.

[suburban-gerbil-deactivated2013]

[givemeinternet]

As close as you will ever be to a nuclear explosion

[merauderdon]

THIS IS FUCKING TERRIFYING

[bigcoolscorner-deactivated20160]

No thank you.

[jonkakes]

The columns of smoke in the foreground are telephone poles boiling

[lumo-blaze-deactivated20140728]

This is way cooler to look at than it should be

[engineer--cat]

Science side of Tumblr would like to add:

Heat is generally transmitted in 3 forms: conduction, convection, radiation.

The fact that the telephone poles and wires are boiling away well before the shockwave hits them indicates that the heat from the explosion has not reached them by convection (much slower than the speed of sound) or by conduction (at best, comparable to the speed of sound), but purely by radiation. In other words: the explosion is bright enough to boil everything.

[angelicsubmissive]

😧

[scientius]

[lmnpnch]

[likeafieldmouse-deactivated2015]

Tim Hawkinson - Mobius Ship (2011)

[secretdogs-deactivated20160131]

dude

[astronomicalwonders]

The Fairy of The Eagle Nebula - M16

"The dust sculptures of the Eagle Nebula are evaporating. As powerful starlight whittles away these cool cosmic mountains, the statuesque pillars that remain might be imagined asmythical beasts. Pictured above is one of several striking dust pillars of the Eagle Nebula that might be described as a gigantic alien fairy. This fairy, however, is ten light years tall and spews radiation much hotter than common fire. The greater Eagle Nebula, M16, is actually a giant evaporating shell of gas and dust inside of which is a growing cavity filled with a spectacular stellar nursery currently forming an open cluster of stars. The above image in scientifically re-assigned colors was released in 2005 as part of the fifteenth anniversary celebration of the launch of the Hubble Space Telescope.”

Credit: NASA/Hubble/APOD

[skunkbear]

The New Horizons spacecraft just woke up from a nine year nap. It’s three billion miles away from home, and it’s about to fly within a few thousand miles of Pluto, giving humans their first up close view of the dwarf planet.