Science ke bacche

The three largest glaciers in Greenland -- which hold enough frozen water to lift global sea levels some 1.3 metres -- could melt faster than even the worst-case warming predictions, research published showed. Until 2000, the main driver of sea level rise was melting glaciers and the expansion of ocean water as it warms. But over the last two decades, the world's ice sheets atop Greenland and Antarctica have become the single largest source of sea level rise. A team of researchers based in Denmark and Britain used historical images and a host of other data to estimate how much ice had been lost from Greenland's Jakobshavn Isbrae, Kangerlussuaq Glacier and Helheim Glaciers in the 20th century. They found that  Jakobshavn Isbrae lost more than 1.5 trillion tonnes of ice between 1880-2012, while Kangerlussuaq and Helheim lost 1.4 trillion and 31 billion tonnes from 1900-2012, respectively. The ice melt has already contributed more than eight millimetres to global sea levels, the r...

As Perseverance closes in on Mars, Curiosity is still up and about doing its job, collecting samples, clicking selfies.  NASA’s Jet Propulsion Laboratory (JPL) explained in a blog that Curiosity is currency around an area in Mars known as Mary Anning. Everyone is waiting for NASA’s 2020 mission which is going to bring the Perseverance rover and the Ingenuity helicopter to Mars. The new instruments and their abilities, as  BGR  writes, will be crucial in revealing new details about the Red Planet. However, while we wait for this, there is already a rover in Mars that has been cruising around for the last eight years. Nuclear-powered rover Curiosity that landed on Mars in 2012 is still up and about and is currently investigating a new site on the planet, collecting samples etc. Curiosity handlers back down in NASA decided to take a little break and made the robot take a stunning selfie. Nuclear-powered rover Curiosity that landed on Mars in 2012 is still up and about and is...