The moon is a bit more than one-fourth (27 percent) the size of Earth, a much larger ratio (1:4) than any other planets and their moons. Earth's moon is the fifth largest moon in the solar system. The moon's mean radius is 1,079.6 miles (1,737.5 kilometers).

The invariant mass of an electron is approximately 9.109×10−31 kilograms, or 5.489×10−4 atomic mass units. On the basis of Einstein's principle of mass–energy equivalence, this mass corresponds to a rest energy of 0.511 MeV.

Protons have a positive electrical charge of one (+1) and a mass of 1 atomic mass unit (amu), which is about 1.67×10−27 kilograms

The total area of Estados Unidos or USA is 3.8 million square miles (9.8 million square kilometers), it is the world's third- or fourth-largest country by total area.

Falling raindrops hit 5 to 20 mph speeds. Wonderquest. Albuquerque: 19 Dec 2001. "At sea level, a large raindrop about 5 millimeters across (house-fly size) falls at the rate of 9 meters per second (20 miles per hour). Drizzle drops (less than 0.5 mm across, i.e., salt-grain size) fall at 2 meters per second (4.5 mph)."

 Sun is a bright, hot ball of hydrogen and helium at the center of our solar system. It is 864,000 miles (1,392,000 km) in diameter, which makes it 109 times wider than Earth. It's 10,000 degrees Fahrenheit (5,500 degrees Celsius) at the surface, and 27 million degrees Fahrenheit (15,000,000 degrees Celsius) in the core

Typhoon Haiyan(Philippine name-Yolanda)the most powerful storm ever recorded to strike land. This record was later tied by Typhoon Meranti in 2016.

Type II Civilizations are civilizations that have control over more than one stellar system, and/or theoretically are able to harness all the power available in a single star

The nearest star to Earth, Proxima Centauri (a member of the triple system of Alpha Centauri), has a parallax of 0.76813", meaning that its distance is 1/0.76813, or 1.302, parsecs, which equals 4.24 light-years.

In many areas of physics, there are various symmetries associated with a physical theory.

At low energies, some of the symmetries can be broken, as shown below. In this case, the theory has continuous rotation symmetry that is broken by the ground state particle.

The Goldstone theorem dictates that one massless boson (Goldstone boson) is associated with each spontaneous broken continuous symmetry.

The four bases of DNA are: adenine (A), thymine (T), guanine (G), and cytosine (C).

The mount rushmore presidential sculptures were made by a guy affiliated with the KKK

Vaccines mimic the virus or bacteria that causes disease and triggers the body’s creation of antibodies. These antibodies will provide protection once a person is infected with the actual disease-causing virus or bacteria.

Science is the pursuit and application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence. Scientific methodology includes the following: ... Evidence. Experiment and/or observation as benchmarks for testing hypotheses.

The surface area of Jupiter is 6.21796×10 10 km 2. And just for comparison, that’s 122 times more surface area than Earth. And finally, the mass of Jupiter is 1.8986×10 27 kg. That’s enough mass for 318 Earths. In fact, Jupiter is 2.5 times more than the mass of all the other planets in the Solar System

Diving face first onto a live grenade isnt guaranteed to kill you.

With that said, eating a spoonful of Raisin Bran isnt guaranteed to not kill you.

Physicists sometimes have to resort to fancy calculation tricks to extract answers.

One such example is dimensional regularisation where a physicist would solve a problem in a d-e dimensional space and e is a small number that is not an integer and finally taking e to 0.

Another tool is to analytically continue to imaginary time that converts the problem to one stated in a better behaved Euclidean space.

1 km2 is equal to: 1,000,000 square metres (m2) 100 hectares (ha)

Before radar existed, there were 'war tubas'

aka acoustic mirrors used to seek out distant enemy aeroplanes.

One issue with the big bang model is that it does not explain why cosmic background radiation is so uniform. (Uniform background radiation implies the observable universe has been in thermal equilibrium whereas calculations show that the observable universe should consist of one million disconnected regions that do not interact with one another.

Inflationary cosmology provides a solution: During inflation, the Hubble sphere (beyond which objects recede from us quicker than the speed of light) shrinks so that two regions that appear to be causally disconnected at present time could have been in thermal contact at earlier times.

@DamnedByFate old username was @NewgroundsMike

@SentForMe (aka @RightTime, who deleted his account twice, gave him this name)

@Sobolev's old username was @i-am-ghey.

He still is, no matter how much he denies it.

The American inventor Christopher Sholes designed the QWERTY keyboard. Sholes worked as a newspaper in Milwaukee. When his compositors went on a strike, he tried to invent a typesetting machine so he wouldn’t have to rely on them anymore.

Thermodynamics is the study of the relations between heat, work, temperature, and energy. The laws of thermodynamics describe how the energy in a system changes and whether the system can perform useful work on its surroundings.

Dry water, an unusual form of "powdered liquid", is a water–air emulsion in which tiny water droplets, each the size of a grain of sand, are surrounded by a sandy silica coating. Dry water actually consists of 95% liquid water, but the silica coating prevents the water droplets from combining and turning back into a bulk liquid

I'm getting smarter every day thanks to this thread

Cryonic technicians drain their blood and replace it with a solution designed to preserve organs, then follow it up with a “cryoprotectant” solution that freezes cells without causing the crystal formation that would damage them when returned to normal temperature

In ancient Egypt, Pharaohs would have a slave covered entirely in honey, and have them placed in an adjoining room, so that all the flies would congregate on the slave rather than bother the Pharaoh.

(For all you WarioWare fans)

Did you know, that Kat and Ana's names together spell Katana?

The more you know!

Sumer was an ancient civilization founded in the Mesopotamia region of the Fertile Crescent situated between the Tigris and Euphrates rivers. Known for their innovations in language, governance, architecture and more, Sumerians are considered the creators of civilization as modern humans understand it.