Cow may be biggest mammal if humans keep up extinctions: Study

Agencies
May 12, 2018

Oslo, May 12: The spread of humans around the world from Africa thousands of years ago wiped out big mammals in a shrinking trend that could make the cow the biggest mammal on Earth in a few centuries` time, a scientific study said on Thursday.

The spread of hominims - early humans and relatives such as Neanderthals - from Africa coincided with the extinction of mammals such as the mammoths, sabre-toothed tiger and glyptodon, an armadillo-like creature the size of a car.

"There is a very clear pattern of size-biased extinction that follows the migration of hominims out of Africa," lead author Felisa Smith of the University of New Mexico told Reuters of the study published in the journal Science.

Humans apparently targeted big species for meat, while smaller creatures such as rodents escaped, according to the report examining trends over 125,000 years.

In North America, for instance, the mean body mass of land-based mammals has shrunk to 7.6 kg (17 lbs) from 98.0 after humans arrived.

If the trend continues "the largest mammal on Earth in a few hundred years may well be a domestic cow at about 900 kg" (2,000 lbs), the U.S. team wrote.

That would mean the loss of creatures including elephants, giraffes and hippos. In March, the world`s last male northern white rhino died in Kenya.

But other research casts doubt on a continued shrinking of mammals, partly because of conservation efforts to stave off threats to wildlife such as climate change, loss of forest habitats and pollution and expanding cities.

Thomas Brooks, chief scientist of the International Union for Conservation of Nature (IUCN) who was not involved in the study, said the projection of ever smaller mammals was "doom and gloom."

"Happily I don`t think it`s very likely," he told Reuters, saying that other research suggests that large animals such as elephants are more likely to benefit in protected areas than smaller ones.

And a Red List of threatened species, maintained by the IUCN, also lists some wild mammals roughly the size of a cow - such as the African buffalo or the brown bear - as unendangered.

The Science study also excludes marine mammals such as the blue whale, the largest creature that has ever existed. It is endangered on the Red List but the populations are rising after a moratorium on hunts.

Smith said that "my optimist hat would like to say that it`s not going to happen because we love elephants`." But she said populations of large land mammals were falling and "declining population is the trajectory to extinction."

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News Network
May 12,2024

Mangaluru, May 12: In a shocking development, a group of pilgrims which had travelled from Mangaluru International Airport to Saudi Arabia earlier this month, to perform Umrah has alleged that 26,432 Saudi Riyals, which were kept in a bag, have been stolen. 

In a complaint submitted to the Bajpe Police, Soukath Banu, wife of Ahmed Iqbal of Ajyad Tours and Travels, said that her husband, Ahmed Iqbal, along with 35 members, planned and scheduled to perform the Umrah and were travelling from Mangaluru International Airport (MIA) via Mumbai to Jeddah. 

Soukath Banu had given Ahmed Iqbal 2,000 Saudi Riyals for performing Umrah and other expenses. The group members were also told to bring Saudi Riyals to meet their expenses.

In her plaint, Soukath stated that the group had left for Jeddah on an IndiGo flight via Mumbai, and their return ticket to India was booked for May 13. 

At the airport, she said that 26,432 Saudi Riyals were collected in total, and they decided to keep them in baggage that had a lock. Accordingly, it was kept in the bag of Mohammad Badruddin Kadambar. The airport staff had even questioned what he had kept in the bag. 

The group reached Jeddah on May 1. To their surprise, Kadambar found that the baggage lock was broken open, the zip was damaged, and cash was stolen upon reaching Jeddah.

DCP (Law and Order) Sidharth Goyal said that following the complaint, one round of CCTV checks was conducted at the MIA along with the CISF personnel. The loading at the MIA was intact.

Further checks have to be carried out at Mumbai and Jeddah Airport as the victim found out that cash was missing only when they got the bag at the final destination, he added.

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News Network
May 11,2024

solarpower.jpg

Washington, May 11: The most powerful solar storm in more than two decades struck Earth on Friday, triggering spectacular celestial light shows from Tasmania to Britain -- and threatening possible disruptions to satellites and power grids as it persists into the weekend.

The first of several coronal mass ejections (CMEs) -- expulsions of plasma and magnetic fields from the Sun -- came just after 1600 GMT, according to the National Oceanic and Atmospheric Administration (NOAA)'s Space Weather Prediction Center.

It was later upgraded to an "extreme" geomagnetic storm -- the first since the "Halloween Storms" of October 2003 caused blackouts in Sweden and damaged power infrastructure in South Africa. More CMEs are expected to pummel the planet in the coming days.

Social media lit up with people posting pictures of auroras from northern Europe and Australasia.

"We've just woken the kids to go watch the Northern Lights in the back garden! Clearly visible with the naked eye," Iain Mansfield in Hertford, England, told AFP.

That sense of wonder was shared in Australia's island state of Tasmania.

"Absolutely biblical skies in Tasmania at 4 am this morning. I'm leaving today and knew I could not pass up this opportunity," photographer Sean O' Riordan posted on social media platform X alongside a photo.

Authorities notified satellite operators, airlines, and the power grid to take precautionary steps for potential disruptions caused by changes to Earth's magnetic field.

Elon Musk, whose Starlink satellite internet operator has some 5,000 satellites in low Earth orbit, described the solar storm as the "biggest in a long time."

"Starlink satellites are under a lot of pressure, but holding up so far," Musk posted on his X platform.

Unlike solar flares, which travel at the speed of light and reach Earth in around eight minutes, CMEs travel at a more sedate pace, with officials putting the current average at 800 kilometers (500 miles) per second.

The CMEs emanated from a massive sunspot cluster that is 17 times wider than our planet. The Sun is approaching the peak of an 11-year cycle that brings heightened activity.

'Go outside tonight and look'

Mathew Owens, a professor of space physics at the University of Reading, told AFP that how far the effects would be felt over the planet's northern and southern latitudes would depend on the storm's final strength.

"Go outside tonight and look would be my advice because if you see the aurora, it's quite a spectacular thing," he said. People with eclipse glasses can also look for the sunspot cluster during the day.

In the United States, this could include places such as Northern California and Alabama, officials said.

NOAA's Brent Gordon encouraged the public to try to capture the night sky with phone cameras even if they couldn't see auroras with their naked eyes.

"Just go out your back door and take a picture with the newer cell phones and you'd be amazed at what you see in that picture versus what you see with your eyes."

Spacecraft and pigeons

Fluctuating magnetic fields associated with geomagnetic storms induce currents in long wires, including power lines, which can potentially lead to blackouts. Long pipelines can also become electrified, leading to engineering problems.

Spacecraft are also at risk from high doses of radiation, although the atmosphere prevents this from reaching Earth.

NASA has a dedicated team looking into astronaut safety and can ask astronauts on the International Space Station to move to places within the outpost that are better shielded.

Following one particularly strong flare peak, the US Space Weather Prediction Center said users of high-frequency radio signals "may experience temporary degradation or complete loss of signal on much of the sunlit side of Earth."

Even pigeons and other species that have internal biological compasses could also be affected. Pigeon handlers have noted a reduction in birds coming home during geomagnetic storms, according to NASA's Jet Propulsion Laboratory.

Officials said people should have the normal backup plans in place for power outages, such as having flashlights, batteries, and radios at hand.

The most powerful geomagnetic storm in recorded history, known as the Carrington Event after British astronomer Richard Carrington, occurred in September 1859.

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News Network
May 6,2024

Bengaluru, May 6: Arrested JD-S MLA H.D. Revanna, the son of former PM H.D. Deve Gowda, on Sunday said that there is no evidence against him in the sex video scandal kidnapping case and that it was a "conspiracy" against him.

Talking to the media, while being taken for a medical test before being produced in front of a court here, Revanna stated that a kidnapping case had been lodged against him though he does not have 'one black mark' against him in his entire career of 40 years.

"Without evidence, I have been targeted... All allegations against me are false. My arrest has been made out of ill intention," he claimed.

"The case was lodged on April 28, then, they did not have any evidence. Later, the fake evidence was created on May 2 and I was fixed," he alleged.

Home Minister Dr G. Parameshwara stated on Sunday that a Blue Corner notice has already been issued against Revanna's son and MP Prajwal Revanna, the prime accused in the sex video scandal, as he is believed to be abroad.

"The Interpol will communicate to all nations and he will be located. Once he is located, the SIT will take a call on how he should be secured and brought back to India," he added.

Revanna was arrested on Saturday on charges of kidnapping one of the victims of the sex video scandal.

Parameshwara further maintained that the arrest of Revanna has saddened JD-S leaders and if action was not taken, the SIT would be blamed too.

Meanwhile, Congress President Mallikarjun Kharge refused to comment on the alleged sex video scandal involving Prajwal Revanna.

About Revanna's arrest, he said that the SIT would initiate action as per the law. "Those indulging in such acts must be taught a lesson and justice should be given to the families of victims. No one can escape the law. No one should use this case politically," he stated.

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