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10 hours ago · Ordinary matter interacts in many different ways, which allows the matter to form more complex structures. For example, stars form through gravity, but the particles within them interact and can emit energy in the form of neutrinos and electromagnetic radiation through fusion when they become energetic enough.
10 hours ago · The interpretation of the cosmic microwave background was a controversial issue in the late 1960s. Alternative explanations included energy from within the solar system, from galaxies, from intergalactic plasma, from multiple extragalactic radio sources. Two requirements would show that the microwave radiation was truly "cosmic".
10 hours ago · Democracy (from Ancient Greek: δημοκρατία, romanized : dēmokratía, dēmos 'people' and kratos 'rule') [1] is a system of government in which state power is vested in the people or the general population of a state. [2] Under a minimalist definition of democracy, rulers are elected through competitive elections while more expansive ...
10 hours ago · John Stuart Mill (20 May 1806 – 7 May 1873) was an English philosopher, political economist, politician and civil servant.One of the most influential thinkers in the history of liberalism, he contributed widely to social theory, political theory, and political economy.
10 hours ago · t. e. Hypertension, also known as high blood pressure, is a long-term medical condition in which the blood pressure in the arteries is persistently elevated. [11] High blood pressure usually does not cause symptoms itself. [1] It is, however, a major risk factor for stroke, coronary artery disease, heart failure, atrial fibrillation, peripheral ...
