Earth Science

Plate tectonics | Quick recycling of Earth’s crust in less than 500 million years

Plate tectonics and the mantle You may feel that the grounds you play football on every evening is unchanging as ever. However, nothing can be further from the truth. The earth's crust too undergoes a cycle of birth and death that have changed the way our planet looks over millions of years. In 2011, scientists found evidence that this cycle was quicker than thought: 500 million years instead of 2 billion. The tectonic plates that constitute the crust are pushing, pulling or brushing past one another,...

Earth Science

Total Solar Eclipse of 2017 and New Learnings for Science

In what is being called the 2017 Great American Eclipse, about all of North America was swathed in different shades of darkness on August 21, 2017 in the event of a total solar eclipse (Fig 1). The total solar eclipse was viewed by people in North America, and a partial eclipse was visible to people in parts of South America, Europe and Africa. The path of totality, or the line sketched by the 2017 Great American Eclipse covering narrow regions in total darkness passed through areas of 14 American...

Earth Science

Ten Most Saline Locations on Earth

The most saline locations on Earth contain salt, or sodium chloride, and also other minerals and contain these in much greater quantities than the ocean. The following are the locations in the world with the greatest concentration of salt, with salinity levels that in many cases are inimical for life to survive in these places. Don Juan Pond Among the most saline locations on Earth, in terms of natural water bodies, the most saline is the Don Juan Pond in Antarctica. The pond has a salinity...

Earth Science

Pink Rainbows Appear in the United Kingdom

A pink rainbow was observed from parts of Western England on August 7, 2017 which is a rare occurrence. Pink rainbows occur as optical effects depending on how we view phenomena and is caused by the refraction of sunlight from a reddish evening sun by droplets of water in the Earth’s atmosphere. In the evening the angle of sunlight reaching an area on Earth makes it pass through a greater depth of atmosphere than in the daytime. In such a circumstance, colours occupying shorter wavelengths...

Earth Science

Types of Winds | Why They are Not the Same at all Times

World wind types On May 30, 2017, a severe cyclonic storm ‘Mora’ crossed the Bangladesh coast in the forenoon, with a peak surface wind speed of 130 kmph (IMD, 2017). The cyclone claimed 9 lives in Bangladesh along with massive damage to property. Mizoram reported heavy rainfall accompanied with strong gusts of wind that is reported to have damaged about 80 buildings, most particularly in Siaha district, where damages were reported at the district headquarters and the district hospital...

Earth Science

Stunning Limestone caverns | Debating how they were ever formed

Have you ever visited the Son Doong Cave in the forests of Vietnam. It is among the largest and most spectacular caves in the world, measuring 5.5 miles in length, with some of its largest caverns high enough to house a 40 storey building. Inside the cave is a pristine jungle 600 feet below the surface with an underground river flowing through it. Mammoth National Park in Kentucky possesses an area of 80 square miles of a maze of caves. The cave has not yet been fully explored, with new chambers...

Earth Science

Illegal Mining monitoring by Indian Space Research Organization

Illegal mining and its control has always been troublesome for India. Mining activity is illegal if it is done without licenses or outside the permitted leased areas. Even extraction above the permissible limit is illegal. Though hazards from illegal mining are similar to normal mining, it intensifies the hazard condition without any gain. It leads to rapid environmental degradation, illegal forest cutting, ecological changes, severe health hazards, corruption, etc. So, monitoring illegal mining...

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Five Types of Natural Springs found in India

Natural springs are an important part of the hydrological cycle and interestingly is classified into different types. Some of these are presented below.

Earth Science # Science

Four types of river deltas and stunning patterns on our planets

When rivers meet the ocean, coastlines tend to bend outward, forming a delta. These deltas when looked from space present multifarious patterns.

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NASA Researchers Discover 7 Earth-Sized Exoplanets Nearby

With the discovery of seven Earth-sized planets orbiting a dwarf star, we are on the right track to find another habitable system! What makes this discovery by NASA’s Spitzer Space Telescope special is that this is the first time that a series of Earth-sized planets have been found around a single star, hence setting a new record for seemingly habitable planets around a single star outside our solar system. All seven planets may have water in the liquid state and be habitable in the future with...