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The primary law governing nationality of the Republic of Ireland is the Irish Nationality and Citizenship Act 1956, which came into force on 17 July 1956. All persons born in the Republic before 1 January 2005 are automatically citizens by birth regardless of the nationalities of their parents. Individuals born in the country since that date receive Irish citizenship at birth if at least one of their parents is an Irish citizen or entitled to be one, a British citizen, a resident with no time limit of stay in either the Republic or Northern Ireland, or a resident who has been domiciled on the island of Ireland for at least three of the preceding four years. Persons born in Northern Ireland are usually entitled to – but not automatically granted – Irish citizenship, largely under the same terms. Foreign nationals may become citizens by naturalisation after meeting a minimum residence requirement, usually five years. The president of Ireland may also grant honorary citizenship, which entails the same rights and duties as normal citizenship, although this is rare. (Full article...)
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Malagasy woman wearing masonjoany
Malagasy woman wearing masonjoany

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Wildfire damage to Lahaina
Wildfire damage to Lahaina

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August 20

Al-Shifa pharmaceutical factory
Al-Shifa pharmaceutical factory
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Viscosity

The viscosity of a fluid is a measure of its resistance to deformation at a given rate. The SI unit of viscosity is the pascal-second. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water. Viscosity quantifies the internal frictional force between adjacent layers of fluid that are in relative motion. For instance, when a viscous fluid is forced through a tube, it flows more quickly near the tube's axis than near its walls. This fluid animation shows a simulation of two fluids with different viscosities being poured into identical containers. The blue liquid on the left has a lower viscosity than the orange liquid on the right.

Animation credit: Gvbox

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