Things to think about in your free time.

The chakram is a throwing weapon from the Indian subcontinent. It is circular with a sharpened outer edge and a diameter of 12–30 cm. It is also known as chalikar meaning "circle", and was sometimes referred to in English writings as a "war-quoit". The chakram is primarily a throwing weapon, but can also be used hand-to-hand. A smaller variant called chakri is worn on the wrist. A related weapon is the chakri dong, a bamboo staff with a chakri attached at one end.

The chakram is a throwing weapon from the Indian subcontinent. It is circular with a sharpened outer edge and a diameter of 12–30 cm. It is also known as chalikar meaning "circle", and was sometimes referred to in English writings as a "war-quoit". The chakram is primarily a throwing weapon, but can also be used hand-to-hand. A smaller variant called chakri is worn on the wrist. A related weapon is the chakri dong, a bamboo staff with a chakri attached at one end.

The chakram is a throwing weapon from the Indian subcontinent. It is circular with a sharpened outer edge and a diameter of 12–30 cm. It is also known as chalikar meaning "circle", and was sometimes referred to in English writings as a "war-quoit". The chakram is primarily a throwing weapon, but can also be used hand-to-hand. A smaller variant called chakri is worn on the wrist. A related weapon is the chakri dong, a bamboo staff with a chakri attached at one end.

When oil is submerged in water, it experiences a force known as buoyancy, which is essentially the water pushing up on the oil. This force is equal to the weight of the water displaced by the oil. Since oil is less dense than water, the buoyant force it experiences is greater than its own weight, causing it to float. Density plays a crucial role here. Density is defined as mass per unit volume, so when comparing the density of oil to water, it's like comparing how much stuff is packed into a certain amount of space. Oil molecules are less tightly packed than water molecules, so oil is less dense than water. This means that even though oil may weigh less than water per unit volume, it takes up more space. If oil were denser than water, like iron, it would sink rather than float. This is because the buoyant force exerted by the water would be less than the weight of the denser substance, causing it to be pulled downward. In essence, the concept of buoyancy, along with density, explains why oil floats on water, providing a fundamental understanding of the behavior of substances in fluids.

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**Nephilim Biblical offspring of the "sons of God" and the "daughters of men" before the Flood; of uncertain and much-disputed etymology. The only obvious meaning of this Hebrew term is "fallen ones" — perhaps, those who have come down from the realm of the gods; but then the word might conceivably reflect an entirely different, un-Hebraic background. [Robert Alter, "The Five Books of Moses," 2004] *ilium (n.) pelvic bone, 1706, Modern Latin, from Latin ilia (plural) "groin, flank, side of the body from the hips to the groin" (see ileum). In Middle English it meant "lower part of the small intestine." Vesalius gave the name os ilium to the "bone of the flank." **ileum (n.) lowest part of the small intestine, 1680s, medical Latin, from ileum, in medieval medicine "the part of the small intestines in the region of the flank," singular created from Latin ilia (pl.) "groin, flank," in classical Latin, "belly, the abdomen below the ribs," poetically, "entrails, guts." The word apparently was confused in Latin with Greek eileos "colic" (see ileus), or perhaps is a borrowing of it. The sense is "winding, turning," either via the Greek meaning or from the convolutions of the intestines. Earlier in English ylioun (late 14c.), from Medieval Latin ileon. Related: Ileitis; ileal. **ileus (n.) painful intestinal condition, 1706, from Latin ileus "severe colic," from Greek eileos "colic," from eilein "to turn, squeeze," from PIE root *wel- (3) "to turn, revolve."

-Nimrod is a biblical figure mentioned in the Book of Genesis and Books of Chronicles. The son of Cush and therefore a great-grandson of Noah, Nimrod was described as a king in the land of Shinar. The Bible states that he was "a mighty hunter before the Lord [and]... began to be mighty in the earth". Later extra-biblical traditions identified Nimrod as the ruler who commissioned the construction of the Tower of Babel, which led to his reputation as a king who was rebellious against God. Nimrod has not been attested in any historic, non-biblical registers, records or king lists, including those of Mesopotamia itself which are both considerably older and more diverse than the later biblical texts. Historians have failed to match Nimrod with any historically attested figure, or find any historical, linguistic or genetic link between Mesopotamia and the kingdom of Cush, although one recent suggestion among the exclusively Mesopotamian figures is Naram-Sin of Akkad, grandson of Sargon. -A Penning trap is a device for the storage of charged particles using a homogeneous magnetic field and a quadrupole electric field. It is mostly found in the physical sciences and related fields of study as a tool for precision measurements of properties of ions and stable subatomic particles, like for example mass, fission yields and isomeric yield ratios. One initial object of study were the so-called geonium atoms, which represent a way to measure the electron magnetic moment by storing a single electron. These traps have been used in the physical realization of quantum computation and quantum information processing by trapping qubits. Penning traps are in use in many laboratories worldwide, including CERN, to store and investigate anti-particles such as antiprotons. The main advantages of Penning traps are the potentially long storage times and the existence of a multitude of techniques to manipulate and non-destructively detect the stored particles. (Music by They Call Me a God NEFFEX and Machine Whir Swelling View more by Liecio from pixabay.)