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The hypothesis can be tested by further studying these craters, ones on the Moon, or even by sending out space probes to take samples from comets. Credit: YouTube/Harvard University

Comet from edge of solar system killed the dinosaurs: study

Their analysis suggests that we can expect similar impacts every 250 million to 750 million years.

A boulder of ice believed to have rolled down from the Raunthi glacier. Photo courtesy: Wadia Institute of Himalayan Geology

Exclusive | Science

Scientists studying samples to know roots of Uttarakhand glacier disaster

Watch | IIT Madras' home-grown e-bike

The Hindu Net Desk B. Jothi Ramalingam A video featuring Pi Beam's made-in-India sustainable utility e-bike PiMo

The first image sent by NASA’s Perseverance rover upon touching down on Mars shows its shadow upon the Red Planet's surface, at the Jezero crater.

NASA’s Perseverance rover makes historic Mars landing

Reuters The rover will begin its search for traces of ancient microbial life on Mars

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Health

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File photo shows a 3D print of a spike protein of SARS-CoV-2 in front of a 3D print of a SARS-CoV-2 virus particle. Photo: NIH/NIAD-RML via AFP

Coronavirus | Evidence of COVID-19 reinfection without mutations in spike protein

V. Geetanath Joint study by CCMB, Apollo Hospitals provide rare evidence

A view of COVID-19 testing laboratory at Chennai International Airport, in Chennai.

No COVID-19 deaths in last 24 hours in 18 States, UTs: Health Ministry

Special Correspondent India’s cumulative recoveries have been showing a progressive increment on a daily basis, the Health Ministry said

Technology

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WhatsApp messaging users on privacy

Yuthika Bhargava Firm says it had encountered misinformation on now-suspended new policy

1hr

Image used for representation purpose.

Microsoft Teams chat, live events issue is resolved

Ishan Patra The Redmond-based company had earlier confirmed that users in the region may experience delays when receiving chat messages, and later added Teams live events may also be impacted by the issue.

Auctioneer Charterfields has provided details about Jobs’ application

Steve Jobs applied for a job in 1973. That hand-written application is up for auction.

Abhishek Chatterjee The auction will open on February 24 and close on March 24. The job application was first sold for over $175,000 in an auction in 2018.

Environment

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Sloth bears at the Wildlife SOS Agra Bear Rescue Center

How Wildlife SOS rescues elephants and sloth bear from the streets of India

Anisha Menezes A deep dive into how elephants and sloth bear — two of the most exploited wild animals — are rescued from Indian streets and rehabilitated by Wildlife SOS

A. Kumaraguru, Conservation Scientist, Biodiversity Conservation Foundation, briefing the volunteers about the bird census at the Bird Sanctuary at Udhayamarthandapuram in Tiruvarur district, Tamil Nadu on February 17, 2021.

Synchronised bird census begins

C. Jaisankar The enumerators were briefed about the methodology of counting birds, including migratory birds, at an induction programme before the census.

A pangolin climbs out of a cage upon its release into the wild in Sibolangit, North Sumatra, Indonesia | File

Global wildlife trade causes decline of species abundance: study

PTI International wildlife trade is said to be worth between $4 to $20 billion per year

Agriculture

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Netra Vaman, the new dwarf cashew

New variety of dwarf cashew released

Special Correspondent A new variety of dwarf cashew was released by the Directorate of Cashew Research, under the Indian Council of Agricultural Research, at Puttur in Dakshina Kannada on Thursday.Speaking after releasing the variety, which has been named as Netra Vaman, during the Cashew Day at Puttur, Principal Scientist (Horticulture) M. Gangadhara Nayak said that its each nut, small in size, weighed between 5.5 grams and 6 grams. The weight of its medium size apple stood at 50 grams.Mr. Nayak said that it was

Eco-friendly: The main idea behind the concept is to create a healthy atmosphere and to provide livelihood to the needy, says an official.

GVMC mulls growing vegetables, organic crops in green belts

Harish Gilai 22 km stretch of green cover available in city to take up the activity, says official

Multimedia

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Watch | What are trans fats?

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NASA’s Perseverance rover makes historic Mars landing

WhatsApp to reach out to users via 'status' and banners on proposed privacy policy update

Apple lobbies for India incentives as it plans iPad assembly

How Wildlife SOS rescues elephants and sloth bear from the streets of India

All about glaciers: The Hindu Science Quiz

Microsoft Teams chat, live events issue is resolved

Internet services disrupted in Pakistan as undersea cable develops fault

The Pakistan Telecommunication Authority (PTA) said the international submarine cable system near Abu Talat, Egypt, developed the glitch on Wednesday.

Steve Jobs applied for a job in 1973. That hand-written application is up for auction.

The auction will open on February 24 and close on March 24. The job application was first sold for over $175,000 in an auction in 2018.

Teeth from Siberian mammoths yield oldest DNA ever recovered

Until now, the oldest DNA came from a horse that lived in Canada's Yukon territory about 700,000 years ago

Big Tech's Democratic critics discuss ways to strike back with White House

Many lawmakers in recent years have called for laws and regulations to rein in dominant tech companies such as Facebook Inc, Twitter Inc, Alphabet Inc's Google , Amazon.com Inc and Apple Inc.

Bitcoin soars to new high above $52,000; sustainability concerns rise

The world’s biggest digital currency, with a market capitalisation of over $900 billion, hit a record of $52,577.50, fuelled by signs it is winning acceptance among mainstream investors and companies, such as Tesla, Mastercard and BNY Mellon.

Robinhood to allow customers to deposit, withdraw cryptocurrencies

The trading app popular with young investors currently allows customers to buy, sell and hold cryptocurrencies such as Bitcoin on its platform, but users cannot withdraw their assets to transfer to other wallets.

Andhra girl brings laurels to State by identifying asteroid

Gets certificate from intl. organisation for identifying asteroid

Facebook blocks Australians from accessing news on platform

International users outside Australia also cannot share Australian news

New variety of dwarf cashew released

A new variety of dwarf cashew was released by the Directorate of Cashew Research, under the Indian Council of Agricultural Research, at Puttur in

NASA Perseverance rover attempting most difficult Martian touchdown yet

The rover will explore the area around Jezero Crater, once home to a lake fed by a river

Coronavirus | NIMHANS uploads 250 genome sequences

‘India has contributed over 7,000 sequences on the global database’

Amazon documents reveal secret strategy to dodge India’s regulators

Traders in India have long alleged that Amazon’s platform largely benefits a tiny number of big sellers and that the American giant engages in predatory pricing.

Data | Tamil Nadu and Punjab falling behind other States in COVID-19 vaccination drive

India had administered 0.63 doses per 100 people as of February 15

Coronavirus | Evidence of COVID-19 reinfection without mutations in spike protein

Joint study by CCMB, Apollo Hospitals provide rare evidence

‘Xbox Wireless Headset’ promises to deliver customisable audio experience for gamers

The latest accessory in the Xbox family has dual beamforming microphone elements focusing on speech audio, and voice isolation tuning to help the microphone pick up voice instead of background noise

Russia's unmanned cargo ship docks at International Space Station

The Progress MS-16 cargo ship has delivered water, propellant and other supplies to the orbiting outpost

Comet from edge of solar system killed the dinosaurs: study

Their analysis suggests that we can expect similar impacts every 250 million to 750 million years.

Unpatched security bug in SHAREit can let hackers inject malware

The vulnerabilities were discovered by researchers from Trend Micro, a cyber security firm, who said these can be used to download and steal files from users’ devices.

Synchronised bird census begins

The enumerators were briefed about the methodology of counting birds, including migratory birds, at an induction programme before the census.

Best from science journals: Listen to the sound of an 18,000-year-old seashell horn

Here are some of the most interesting research papers to have appeared in top science journals last week.

Hyundai unveils concept vehicle that can walk on four legs

TIGER is designed to operate autonomously and features a sophisticated leg and wheel locomotion system. The UMV retracts its wheels to drive in its most efficient mode, and uses its walking ability when stuck or needs to travel over difficult terrain.

Coronavirus | No COVID-19 death in 18 States in 24 hours

Maharashtra, Kerala, Tamil Nadu among six States which recorded fatalities

Facebook says AI helped reduce hate speech on its platform last quarter

The company said its multilingual systems helped moderate content in several languages including Arabic and Spanish, targeting nearly 27 million piece of hateful content last quarter.

Global wildlife trade causes decline of species abundance: study

International wildlife trade is said to be worth between $4 to $20 billion per year

Kidnap capital Mexico eyes biometric phone registry, sparking privacy fears

Under the plan, America Movil, AT&T Inc and other carriers would be responsible for collecting customers' data, including fingerprints or eye biometrics, to submit to a registry managed by Mexico's telecoms regulator.

Printed in days, a house: New York firm takes 3D printing to the next level

With a detached garage, the house will cover some 1,400 square feet (130 square meters). The footings, foundation and slab, along with the walls, will be entirely made with the 3D printer.

China steps up online controls with new rule for bloggers

Beginning next week, the Cyberspace Administration of China will require bloggers and influencers to have a government-approved credential before they can publish on a wide range of subjects.

COVID-19: India records 11,610 fresh cases, 100 more fatalities; recovery rate 97.33%

There are 1,36,549 active cases of the coronavirus infection in the country currently, which account for only 1.25% of its total caseload, the Health Ministry data stated

Bitcoin vaults above $50,000 for first time ever

Record high signals acceptance among mainstream investors

GVMC mulls growing vegetables, organic crops in green belts

22 km stretch of green cover available in city to take up the activity, says official

Leopard population tracking gets new approach

Unique model to estimate their numbers where melanistic individuals are seen

Relief for farmer in ‘Santhwana Sparsam’

The plea by Joy Thekkan of Kunnukara panchayat to resolve technical difficulties so that he could get the support price for bananas he has been

Northern Shoveler duck spotted at Thuraiyur Chinna Eri

The Chinna Eri in Thuraiyur has attracted Northern Shoveler, a duck species, much to the surprise of bird watchers since the pollution level has been

Bengaluru doctors remove a 3.5 kg tumour from 15-year-old girl’s neck

After living with a 3.5 kg tumour that extended from her neck onto her chest for almost a decade, life has completely changed for 15-year-old Surbhi

Families with SMA babies hope for miracle cure

Parents of babies with Spinal Muscular Atrophy (SMA), a rare genetic disease, came together at an event organised by Bangalore Baptist Hospital in the

Scientists studying samples to know roots of Uttarakhand glacier disaster

Five WIHG researchers travel to disaster site and undertake aerial surveys

Chinese investor in Koo's parent firm on way out

Koo, which caught public attention after the Indian government's tussle with Twitter over the removal of inflammatory contents, has crossed over 3 million downloads with about a million active users.

Zinc, vitamin C supplements does not decrease duration of COVID-19 symptoms: study

The study showed no significant difference between the usual care, vitamin C, zinc gluconate or the group receiving both vitamin C and zinc gluconate.

Apple to fix charging issues in its watch for free

(Subscribe to our Today's Cache newsletter for a quick snapshot of top 5 tech stories. Click here to subscribe for free.)After a software update on

Watch | IIT Madras' home-grown e-bike

A video featuring Pi Beam's made-in-India sustainable utility e-bike PiMo

Google fined $1 million for misleading French hotel rankings

Google said that it has now made the “necessary changes to only reflect the official French star rating for hotels on Google Maps and Search.”

All JLR cars to be fully electric by 2030; Jaguar all electric by 2025

Known for its iconic, high-performance E-Type model in the 1960s and 1970s, Jaguar faces the challenge of many other carmakers - making the transition to electric vehicles while retaining the feeling and power of a luxury combustion engine model.

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Without referring to the relentless increase in retail fuel prices, which are linked to international rates, he said India imported over 85% of its oil needs in the 2019-20 financial year. Screengrab

41K | Petrol at ₹100 | PM Modi blames previous governments for not cutting import dependence

A South African woman is briefed before taking a COVID-19 test at the Ndlovu clinic in Groblersdal , 200 kms north-east of Johannesburg in South Africa.

30K | South Africa asks Serum Institute to take back 1 million vaccine doses, says report

Maharashtra Congress chief Nana Patole. File

27K | Petrol at ₹100 | Maharashtra Congress chief Nana Patole threatens to stall films of Amitabh Bachchan, Akshay Kumar

SNN Raj Lakeview apartment in Bengaluru on February 16, 2021.

26K | 103 COVID cases at Bommanahalli apartment

Snowplows works to clear the road during a winter storm in Oklahoma City. Snow and ice blanketed large swaths of the U.S. on Sunday, prompting cancellated flights, making driving perilous and reaching into areas as far south as Texas’ Gulf Coast, where snow and sleet were expected overnight.

24K | 21 dead as Texas deep freeze leaves millions without power

Journalist Priya Ramani is seen with her lawyer Rebecca John in New Delhi on February 17, 2021 after a court acquitted her in a defamation case filed by former Union Minister M.J. Akbar. Photo: Special Arrangement

20K | #MeToo: Delhi court acquits Priya Ramani in M.J. Akbar's defamation case

Telangana Governor Tamilisai Soundararajan (R) with Kiran Bedi. File

16K | President Kovind removes Kiran Bedi as Puducherry L-G

Bollywood actress Kangana Ranaut arrives at a police station summoned in connection with a sedition case, in Mumbai on January 8, 2021.

16K | Cannot compile cost of security for Kangana: MHA

A view of University Grants Commission (UGC), in New Delhi. File

14K | UGC asks universities to encourage students to write “cow science” examination