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Curiosity extends evidence of water-bearing minerals when studying the rock Tintina

Curiosity is a car-sized rover designed to explore the crater Gale on Mars as part of NASA’s mission. During the exploration, the wheels of rover crushed a rock which contained hydrated minerals. The rock Tintina, as scientists named it, is another on the list of water evidence at the area.

Gamma-ray burst visible by naked eye

At 06:12 UTC the Swift satellite detected from Earth’s orbit a very strong gamma-ray burst. It was accompanied by visible light, which was observable without any special equipment. The distance of its source was calculated to be 7.5 billion light-years from a solar system. That makes it the farthest object visible to the naked eye in history.

Mexican chemist Mario J. Molina is born

He is one of the people who discovered the ozone hole. Molina joined the lab of American chemist Sherwood Rowland in 1973. They were both interested study of chemical properties of atoms with, and only with, excess translational energy owing to radioactive processes. In 1974 they described the process of ozone breakdown catalyzed by chlorofluorocarbons.

Daylight saving time in the U. S.

American Congress established time zones and approved daylight saving time. The main goal of its introduction was energy saving. By synchronously resetting all clocks in a region to one hour ahead of standard time all the inhabitants of that region gain an extra hour of daylight. This means that they do not use electric lights and many other machines.

British archaeologist John Marshall is born

He served as a Director-General of the Archaeological Survey of India from 1902 to 1928 and oversaw the excavations of Harappa and Mohenjodaro. These two cities belonged to the Indus Valley Civilisation. Along with Ancient Egypt and Mesopotamia, it was one of cradles of civilised society and the most widespread one.

Anniversaries of the (in)famous