Skywatchers around the world can look forward to 11 meteor showers in 2023. Here's how to see them.

Our breaking political news keeps you covered on the latest in US politics, including Congress, state governors, and the White House.

Michael Collins covers the White House and economic issues for USA TODAY. Follow him on Twitter @mcollinsNEWS.

Josh Meyer is a veteran correspondent focusing on domestic, national and global security issues, including terrorism, extremism, cybersecurity and...

A hi-hat (hihat, high-hat, etc.) is a combination of two cymbals and a pedal, all mounted on a metal stand. It is a part of the standard drum kit used by drummers in many styles of music including rock, pop, jazz, and blues. Hi-hats consist of a matching pair of small to medium-sized cymbals mounted on a stand, with the two cymbals facing each other. The bottom cymbal is fixed and the top is mounted on a rod which moves the top cymbal toward the bottom one when the pedal is depressed (a hi-hat that is in this position is said to be "closed" or "closed hi-hats"). The hi-hat evolved from a "sock cymbal", a pair of similar cymbals mounted at ground level on a hinged, spring-loaded foot apparatus. Drummers invented the first sock cymbals to enable one drummer to play multiple percussion instruments at the same time. Over time these became mounted on short stands—also known as "low-boys"—and activated by pedals similar to those used in modern hi-hats. When extended upward roughly 3' (76 cm) they were originally known as "high sock" cymbals, which evolved over time to the familiar "high-hat" term.The cymbals may be played...

Renal replacement therapy (RRT) is therapy that replaces the normal blood-filtering function of the kidneys. It is used when the kidneys are not working well, which is called kidney failure and includes acute kidney injury and chronic kidney disease. Renal replacement therapy includes dialysis (hemodialysis or peritoneal dialysis), hemofiltration, and hemodiafiltration, which are various ways of filtration of blood with or without machines. Renal replacement therapy also includes kidney transplantation, which is the ultimate form of replacement in that the old kidney is replaced by a donor kidney.These treatments are not truly cures for kidney disease. In the context of chronic kidney disease, they are more accurately viewed as life-extending treatments, although if chronic kidney disease is managed well with dialysis and a compatible graft is found early and is successfully transplanted, the clinical course can be quite favorable, with life expectancy of many years. Likewise, in certain acute illnesses or trauma resulting in acute kidney injury, a person could very well survive for many years, with relatively good kidney function, before needing intervention...

The Novum Organum, fully Novum Organum, sive Indicia Vera de Interpretatione Naturae ("New organon, or true directions concerning the interpretation of nature") or Instaurationis Magnae, Pars II ("Part II of The Great Instauration"), is a philosophical work by Francis Bacon, written in Latin and published in 1620. The title is a reference to Aristotle's work Organon, which was his treatise on logic and syllogism. In Novum Organum, Bacon details a new system of logic he believes to be superior to the old ways of syllogism. This is now known as the Baconian method. For Bacon, finding the essence of a thing was a simple process of reduction, and the use of inductive reasoning. In finding the cause of a 'phenomenal nature' such as heat, one must list all of the situations where heat is found. Then another list should be drawn up, listing situations that are similar to those of the first list except for the lack of heat. A third table lists situations where heat can vary. The 'form nature', or cause, of heat must be that which is common to all instances in the first table, is lacking from all...

The Mohs scale of mineral hardness () is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of minerals through the ability of harder material to scratch softer material. The scale was introduced in 1812 by the German geologist and mineralogist Friedrich Mohs, in his book "Versuch einer Elementar-Methode zur naturhistorischen Bestimmung und Erkennung der Fossilien"; it is one of several definitions of hardness in materials science, some of which are more quantitative.The method of comparing hardness by observing which minerals can scratch others is of great antiquity, having been mentioned by Theophrastus in his treatise On Stones, c.  300 BC, followed by Pliny the Elder in his Naturalis Historia, c.  AD 77. The Mohs scale is useful for identification of minerals in the field, but is not an accurate predictor of how well materials endure in an industrial setting – toughness. Minerals The Mohs scale of mineral hardness is based on the ability of one natural sample of mineral...

The Spanish Naval Infantry (Spanish: Infantería de Marina) is the naval infantry unit of the Spanish Navy (Armada Española) responsible for conducting amphibious warfare by utilizing naval platforms and resources. The Marine Corps is fully integrated into the Armada's structure. The Corps was formed in 1537 by Charles I of Spain (also known as Charles V, Holy Roman Emperor), making it the oldest marine corps in existence in the world, drawing from the Compañías Viejas del Mar de Nápoles. Mission The Spanish Marine Infantry is an elite corps, highly specialised in amphibious warfare, that is, to project an amphibious force onto a hostile, or potentially hostile, coast. Its ability to embark on a short term notice with (land, air and naval) Navy assets, makes it a unit with a high strategic value. Adding to this a high degree of training, and the capability to deploy swiftly in international waters, results in a potent dissuasive force available at a short notice...

The History Channel (also known as History) is a Canadian English language specialty channel that primarily broadcast programming related to history and historical fiction. It is owned by Corus Entertainment, with the History branding used under a licensing agreement with A+E Networks. The channel operates two time-shifted feeds: East (Eastern Time) and West (Pacific Time). The West Coast feed was launched on September 1, 2006. History Licensed by the Canadian Radio-television and Telecommunications Commission (CRTC) on September 4, 1996 as The History and Entertainment Network, the channel was originally owned by Alliance Atlantis Communications, and launched as History Television on October 17, 1997. On January 18, 2008, a joint venture between Canwest and Goldman Sachs Capital Partners known as CW Media bought Alliance Atlantis and gained AAC's interest in History Television. On October 8, 2009, Canwest launched a high definition simulcast of History Television. History Television HD initially only had one national feed operating from the Eastern Time Zone. It is available through all major TV providers...