- Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the world. Modern science is typically divided into two or three major branches: the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; and the behavioural sciences (e.g., economics, psychology, and sociology), which study individuals and societies. The formal sciences (e.g., logic, mathematics, and theoretical computer science), which study formal systems governed by axioms and rules, are sometimes described as being sciences as well; however, they are often regarded as a separate field because they rely on deductive reasoning instead of the scientific method or empirical evidence as their main methodology. Applied sciences are disciplines that use scientific knowledge for practical purposes, such as engineering and medicine.
- Al-Qaeda (Wikipedia)
Al-Qaeda (/ælˈkaɪ(ə)də/; Arabic: القاعدة, romanized: al-Qāʿidah, lit. ’the Base’, IPA: [alˈqaː.ʕi.da]) is a pan-Islamist militant organization led by Sunni jihadists who self-identify as a vanguard spearheading a global Islamist revolution to unite the Muslim world under a supra-national Islamic caliphate. Its membership is mostly composed of Arabs but also includes people from other ethnic groups. Al-Qaeda has mounted attacks on civilian, economic and military targets of the US and its allies; such as the 1998 US embassy bombings, the USS Cole bombing, and the September 11 attacks. The organization is designated as a terrorist group by NATO, the UN Security Council, the European Union, and various countries around the world.