Polar may refer to:

World is a common name for the whole of human civilization, specifically human experience, history, or the human condition in general, worldwide, i.e. anywhere on Earth.

In a philosophical context it may refer to: (1) the whole of the physical Universe, or (2) an ontological world (see world disclosure). In a theological context, world usually refers to the material or the profane sphere, as opposed to the celestial, spiritual, transcendent or sacred. The "end of the world" refers to scenarios of the final end of human history, often in religious contexts.

World history is commonly understood as spanning the major geopolitical developments of about five millennia, from the first civilizations to the present.

World population is the sum of all human populations at any time; similarly, world economy is the sum of the economies of all societies (all countries), especially in the context of globalization. Terms like world championship, gross world product, world flags etc. also imply the sum or combination of all current-day sovereign states.

Grizzly Man is a 2005 documentary film by German director Werner Herzog. It chronicles the life and death of bear enthusiast Timothy Treadwell. The film consists of Treadwell's own footage of his interactions with grizzly bears before he and his girlfriend Amie Huguenard were killed and eaten by a bear in 2003, and of interviews with people who knew or were involved with Treadwell. The footage he shot was later found, and the final film was co-produced by Discovery Docs, the Discovery Channel's theatrical documentary unit, and Lions Gate Entertainment. The film's soundtrack is by British singer songwriter and guitarist Richard Thompson.

Timothy Treadwell spent 13 summers in Katmai National Park and Preserve, Alaska. Over time, he believed the bears trusted him and would allow him to approach them; sometimes he would even touch them. Treadwell was repeatedly warned by park officials that his interaction with the bears was unsafe to both him and to the bears. "At best, he's misguided," Deb Liggett, superintendent at Katmai and Lake Clark national parks, told the Anchorage Daily News in 2001. "At worst, he's dangerous. If Timothy models unsafe behavior, that ultimately puts bears and other visitors at risk." Treadwell filmed his exploits, and used the films to raise public awareness of the problems faced by bears in North America. In 2003, at the end of his 13th visit, he and his girlfriend Amie Huguenard were attacked, killed, and partially eaten by a bear; the events which led to the attack are unknown.

Mahmoud Ahmadinejad (Persian: محمود احمدی‌نژاد‎, Mahmūd Ahmadinezhād [mæhˈmuːd(-e) æhmædiːneˈʒɒːd] ( listen),English: /ɑːkməˈdɪnɨʒɒd/; born 28 October 1956) is the sixth and current President of the Islamic Republic of Iran, and the main political leader of the Alliance of Builders of Islamic Iran, a coalition of conservative political groups in the country. An engineer and teacher from a poor background, Ahmadinejad joined the Office for Strengthening Unity after the Islamic Revolution. Appointed a provincial governor, he was removed after the election of President Mohammad Khatami and returned to teaching. Tehran's council elected him mayor in 2003. He took a religious hard line, reversing reforms of previous moderate mayors. His 2005 presidential campaign, supported by the Alliance of Builders of Islamic Iran, garnered 62% of the runoff election votes, and he became President on 3 August 2005. His second presidency term ends on August 3, 2013. He is not eligible to run for another term under the current Iranian constitution.

Steven Tyler (born Steven Victor Tallaricco; March 26, 1948) is an American singer, songwriter, and multi-instrumentalist, best known as the frontman and lead singer of the Boston-based rock band Aerosmith, in which he also plays the harmonica, and occasional piano and percussion. He is known as the "Demon of Screamin'" due to his high screams and his wide vocal range. He is also known for his on-stage acrobatics. During his high-energy performances, he usually dresses in bright, colorful outfits with his trademark scarves hanging from his microphone stand. In the 1970s, Tyler rose to prominence as the frontman of Aerosmith, which released such milestone hard rock albums as Toys in the Attic and Rocks. In the late 1970s and early 1980s, Tyler had a heavy drug and alcohol addiction, and the band's popularity waned.

He completed drug rehabilitation in 1986 and subsequently maintained sobriety for years, but had a relapse with prescription painkillers in the late 2000s, for which he successfully received treatment in 2009. After Aerosmith launched a remarkable comeback in the late 1980s and early 1990s with the albums Permanent Vacation, Pump, and Get a Grip, Tyler became a household name and has remained a relevant rock icon. As a result, he has since embarked on several solo endeavors including guest appearances on other artists' music, film and TV roles (including as a judge on American Idol), authoring a bestselling book, and solo work (including a Top 40 hit single in 2011). However, he has continued to record music and perform with Aerosmith, after more than 41 years in the band. He is included among Rolling Stone's 100 Greatest Singers. He was also ranked 3rd on Hit Parader's Top 100 Metal Vocalists of All Time. In 2001 he was inducted into the Rock and Roll Hall of Fame with Aerosmith, and he was the presenter when AC/DC was inducted into the Hall of Fame in 2003.