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Every year, over 5,000 tonnes of extraterrestrial dust fall to Earth each year, scientists have determined. Our home planet encounters dust from comets and asteroids. These interplanetary dust particles pass through our atmosphere and give rise to shooting stars. Some of them reach the ground in the form of micrometeorites.
Micrometeorites have always fallen on our planet. These interplanetary dust particles from comets or asteroids are particles of a few tenths to hundredths of a millimeter that have passed through the atmosphere and reached the Earth’s surface.
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An international program conducted for nearly 20 years by scientists from the French National Centre for Scientific Research (CNRS), the Universite Paris-Saclay, and the National museum of natural history with the support of the French polar institute, has determined how much of these micrometeorites reach the ground.
To collect and analyze these micrometeorites, six expeditions led by CNRS researcher Jean Duprat have taken place over the last two decades near the Franco-Italian Concordia station (Dome C), which is located 1,100 kilometers off the coast of Adelie Land, in the heart of Antarctica. Dome C is an ideal collection spot due to the low accumulation rate of snow and the near absence of terrestrial dust.
ALSO READ: Where Did Earth Get Its Carbon From?
These expeditions have collected enough extraterrestrial particles (ranging from 30 to 200 micrometers in size), to measure their annual flux, which corresponds to the mass accreted on Earth per square meter per year. If these results are applied to the whole planet, the total annual flux of micrometeorites represents 5,200 tonnes per year, according to the study which will be available in the journal Earth & Planetary Science Letters from April 15.
This is the main source of extraterrestrial dust on our planet, far ahead of larger objects such as meteorites, for which the flux is less than ten tonnes per year. A comparison of the flux of micrometeorites with theoretical predictions confirms that most micrometeorites probably come from comets (80 percent) and the rest from asteroids. The results could help scientists better understand the role played by interplanetary dust particles in supplying water and carbonaceous molecules on the young Earth. (IANS/SP)
Union Finance Minister Nirmala Sitharaman on Saturday asked the Directorate of Revenue Intelligence (DRI) to prevent dumping of toxic wastes in India. Speaking at an event to celebrate DRI's 64th foundation day, Sitharaman lauded DRI's compact strength of about 800 officers for their relentless efforts despite the imminent risks. The Finance Minister stated that the officers may be keeping a low profile, but they are acting like the frontline defence forces, doing spectacular work in safeguarding the economic frontiers of the country. "The recent smuggling attempts of huge quantities of narcotics, gold, red sanders, ivory, cigarettes etc. unearthed by DRI were appreciated by the Finance Minister," the Ministry of Finance said in a statement.
"Sitharaman said that the message through such enforcement actions should be such that these acts of brazen attempts at smuggling are nipped in the bud," the statement added. The Finance Minister also said that better coordination among the law enforcement and intelligence gathering agencies and sharing of actionable intelligence are the way forward in protecting the frontiers of the country more efficiently. "Sitharaman also asked the DRI to focus on interdicting dual use technology items as well as preventing the dumping of toxic wastes in our country," the statement said. (IANS/ MBI)
(Keywords: Directorate of Revenue Intelligence, Nirmala Sitharaman, India, Toxic Wastes)
Tech giant Amazon has expanded the sound detection capabilities of Alexa along with more features. Alexa can now identify the sounds of running water and appliances beeping, reports Android Central. This means users can set up an Alexa routine to notify themselves when the washer beeps to indicate that laundry is finished, the report said.
When Alexa detects that the faucet has been left open, it will send users a notification as well so they can take appropriate action, it added. Amazon previously said at its event in September that it would add the ability to programme Alexa to recognise custom sounds, but that feature has yet to arrive. Having said that, the two new sound detection capabilities not only help users save energy, but they also make it easier to avoid paying for unnecessary charges on your home utilities, the report said.
The retail giant has also announced ultrasound motion detection, which will allow you to set up "Occupancy Routines" on additional Echo devices. This feature allows your smart speaker to detect nearby motion and initiate a routine, such as turning on the lights. It is compatible with many of the best Alexa speakers including the 4th-gen Echo, Echo Dot and Echo Dot with Clock. (IANS/ MBI)
(Keywords: laundry, appliances, beeping, running water, Sound, Alexa , Amazon)
By Olivia Sarkar
Comforting Christmas cocktails help you enjoy the celebrations and get into the festive spirit. The Leela Palaces, Hotels, and Resorts offer distinctive cocktails ranging from Hot Toddies to Decadent Egg Nogs. Sit back and enjoy one martini at a time to make the festive season a little brighter.
Dirty Chai Eggnog:
30 ml Bourbon
30 ml Baileys
90 ml Hot milk tea
Sweet cream foam to top up
Cinnamon powder and star anise.
1. In a heavy bottomed med sauce pot, prepare tea with milk. Strain and let it cool.
2. In a cocktail shaker add egg white, Bourbon, Baileys with whole spices. Shake well.
3. Pour the tea in the glass followed by ingredients from cocktail shaker.
4. Garnish with nutmeg and cinnamon powder, whole star anise
Eggnog is a Christmas favourite that is accustomed to toasts for good health and prosperity.| Pikist
Inspired by the Christmas Spirits and holiday flavours is a wonderful concoction of warm whisky, sweet vanilla, and thick butter.
45 ml Butter fat washed Whiskey
20 ml Ginger bread syrup
15 ml Spiced Apple liquor
2 dashes of Bitters
1/2 teaspoon Vanilla extract
1. Pour all ingredients into a cocktail shaker
2. Shake well
3. Pour into an old-fashioned glass
4. Garnish with Gingerbread cookie
Inspired by the Christmas Spirits and holiday flavors is a wonderful concoction of warm whisky, sweet vanilla, and thick butter. | Flickr
(Keywords: Santa's Apple, Egg Nogs, December, Cocktail, Cocktail, Christmas, holiday, celebrations)