African News

‘I predict a great revolution’: inside the struggle to define life | Science

Published

on

All the brain cells of life on Earth still cannot explain life on Earth. Its most intelligent species has uncovered the building blocks of matter, read countless genomes and watched spacetime quiver as black holes collide. It understands much of how living creatures work, but not how they came to be. There is no agreement, even, on what life is.

The conundrum of life is so fundamental that to solve it would rank among the most important achievements of the human mind. But for all scientists’ efforts – and there have been plenty – the big questions remain. If biology is defined as the study of life, on this it has failed to deliver.

But enlightenment may come from another direction. Rather than biology, some scientists are now looking to physics for answers, in particular the physics of information. Buried in the rules that shape information lie the secrets of life and perhaps even the reason for our existence.

That, at least, is the bold proposal from Paul Davies, a prominent physicist who explores the idea in his forthcoming book, The Demon in the Machine. Published next week, it continues a theme of thinking that landed Davies the $1m Templeton prize for contributions to religious thought and inquiry.

As director of the Beyond Center for Fundamental Concepts in Science at Arizona State University, Davies is well placed to spot the next wave that will crash over science. What he sees on the horizon is a revolution that brings physics and biology together through the common science of information.

“The basic hypothesis is this,” Davies says. “We have fundamental laws of information that bring life into being from an incoherent mish-mash of chemicals. The remarkable properties we associate with life are not going to come about by accident.”

The proposal takes some unpacking. Davies believes that the laws of nature as we know them today are insufficient to explain what life is and how it came about. We need to find new laws, he says, or at least new principles, which describe how information courses around living creatures. Those rules may not only nail down what life is, but actively favour its emergence.

To understand what bothers Davies, consider a hypothetical device: a life meter. Wave it over a sterile rock and the dial stays at zero. Wave it over a purring cat and it swings over to 100. But what if you dunked it in the primordial soup, or held it over a dying person? At what point does complex chemistry become life, and when does life revert to mere matter? Between an atom and an amoeba lies something profound and perplexing.

Davies suspects that information is the answer because it seems increasingly fundamental to both physics and biology. In recent years, physicists have shown that information is more than the bits and bytes that course through computers. Information can be converted into energy, for example, such that physicists now build little information engines and information-powered refrigerators, if not with the appearance their names suggest.

Similar machines are found in biology. Constructed from proteins, they chunter away inside living cells where they manipulate information at the nanoscale. “What we’re seeing in the lab is these two worlds colliding in a very practical way,” he says. “The physics is really connecting with the biology and that’s why I think we’re on the verge of this great new revolution.”

Davies believes that life will turn out to bear telltale patterns of information processing that distinguish it from non-life. Few people would argue that a computer is alive no matter how the ones and zeroes zip around inside it. What Davies suspects is that life exploits, and arises from, particular patterns of information flow.

“When you look at a living system, the way information is managed is very far from random. It will show patterns that could lead us to a definition of life,” he says. “We talk about informational hallmarks and these might be used to identify life wherever we look for it in the universe.”

It is not always easy to convert speculation into science. One of the hurdles Davies raises is the difficulty in describing biological information in terms of mathematics. It is a necessary move if new laws of life are to have any meaning. “I really think we need new physics to understand how information couples to matter and makes a difference in the world,” he says.

Find these new rules and the future could look very different. Davies anticipates “digital doctors”, who will analyse information flows in cells to spot aberrant patterns driven by early cancers and other diseases. When pathological patterns are found, they could be corrected through some form of molecular shiatsu, he suggests.

Most radical, though, is Davies’s proposal that any laws of information that shape life might favour its emergence too. Under this scenario, life would not arise on habitable planets by random chance but would be nurtured by “biofriendly” rules. It is the kind of teleological argument that many scientists reject, but one that Davies cannot help finding attractive.

“People often say that the probability of life forming by chance is so low there must have been intelligent design or a miracle. I find that anathema,” he says. Religious people have got to move on and get away from the idea that there’s a superbeing who fits it all up. What I find more congenial and much more intellectually respectable is the notion of fundamental laws of organisation that turn matter into life – a life principle built into the laws of the universe.”

He concedes: “It is wishful thinking because at this stage I can’t demonstrate it. But if we live in a universe in which the emergence of life is built into it in a fundamental way then we can feel more at home in the universe. It’s no substitute for a caring superbeing watching over us. It won’t help us deal with the problem of death, and it doesn’t help in a moral crisis, but it would certainly be more comforting than to believe we live in an empty, sterile universe.”

Before leaving Britain for posts abroad, Davies worked under Fred Hoyle, the maverick former director of the Institute of Astronomy at Cambridge University. Davies concedes that his one-time mentor helped him to keep an open mind in science. Hoyle was a brilliant academic but among his more fanciful proposals was that flu pandemics were spread by viruses that rained down on Earth from passing comets.

“He was one of these curious people who did some really great things and then some really crazy things,” Davies says. “What I did learn from Fred was not to be afraid of wild thinking.”

Source link

قالب وردپرس

African News

Riot police squads intervene as pro-Israel and pro-Palestinian protesters clash in Montreal

Published

on

By

People wave flags atop cars in traffic during a demonstration to voice support for the people of Palestine, at Toronto City Hall in Toronto, Ontario, Canada, on 15 May 2021.


People wave flags atop cars in traffic during a demonstration to voice support for the people of Palestine, at Toronto City Hall in Toronto, Ontario, Canada, on 15 May 2021.

  • Violence
    between pro-Israel and pro-Palestine protesters in Montreal was condemned by
    Canadian Prime Minister Justin Trudeau.
  • Montreal’s
    city police force intervened and declared the protests illegal after tensions
    heightened and clashes broke out.
  • Israeli
    strikes killed 42 Palestinians in the Gaza Strip on Sunday, the worst daily
    toll in almost a week of clashes.

Montreal
– Canadian Prime Minister Justin Trudeau on Sunday condemned the violence and
“despicable rhetoric” that marked several weekend protests throughout
the country, after clashes between pro-Israel and pro-Palestinian protesters in
Montreal.

The
worst violence in years, sparked by unrest in Jerusalem, is raging between the
Jewish state and Islamist militants.

Israeli
strikes killed 42 Palestinians in the Gaza Strip on Sunday, the worst daily
toll in almost a week of deadly clashes.

Speaking
after protests in Montreal, Trudeau condemned what he said was “despicable
rhetoric and violence we saw on display in some protests this weekend”.

While
insisting on the “right to assemble peacefully and express themselves
freely in Canada”, Trudeau stressed in a tweet that there was no tolerance
for “antisemitism, Islamophobia, or hate of any kind”.

Earlier
on Sunday, Montreal police used tear gas following clashes between pro-Israel
and pro-Palestinian protesters.

Several
hundred demonstrators, draped in Israeli flags, had gathered in a central
Montreal square to express solidarity with the Jewish state.

‘Protesting is a right’

Although
the protest started peacefully, tensions ratcheted up with the arrival of
pro-Palestinian demonstrators and clashes soon broke out.

The
SPVM, Montreal’s city police force, declared the protests illegal, and squads
of riot police intervened, using tear gas to separate and disperse the two
groups, according to an AFP journalist at the scene.

The
police spent much of the afternoon in pursuit of the pro-Palestinian
protesters, who spread out and regrouped in commercial streets in the city centre.

Following
the clashes, Montreal Mayor Valerie Plante said on Twitter that
“protesting is a right”, but that “intolerance, violence and
anti-Semitism have no place here”.

She said:

Montreal is a city of peace.

Several
thousand pro-Palestinian demonstrators had gathered on Saturday in central
Montreal to denounce what they said were Israeli repression and “war
crimes” in Gaza.

“Terrorist
Israel”, some protesters chanted, while others held up a banner that read,
“Stop the genocide of Palestinian children”.

Pro-Palestinian
protests happened the same day in multiple Canadian cities, including Toronto,
Ottawa and Vancouver.


Source link

قالب وردپرس

Continue Reading

African News

Peter Thiel Helps Fund an App That Tells You What to Do

Published

on

By

“How would you feel about being able to pay to control multiple aspects of another person’s life?” asks the BBC.

“A new app is offering you the chance to do just that.”

When writer Brandon Wong recently couldn’t decide what takeaway to order one evening, he asked his followers on social media app NewNew to choose for him. Those that wanted to get involved in the 24-year-old’s dinner dilemma paid $5 (£3.50) to vote in a poll, and the majority verdict was that he should go for Korean food, so that was what he bought…

NewNew is the brainchild of Los Angeles-based entrepreneur Courtne Smith. The app, which is still in its “beta” or pre-full release stage, describes itself as “a human stock market where you buy shares in the lives of real people, in order to control their decisions and watch the outcome”. For many of us that sounds a bit ominous, but the reality is actually far less alarming. It is aimed at what it calls “creators” — writers, painters, musicians, fashion designers, bloggers etc. It is designed as a way for them to connect far more closely with their fans or followers than on other social media services and, importantly, monetise that connection…

Whenever a vote is cast the creator gets the money minus NewNew’s undisclosed commission… In addition to voting, followers can also pay extra — from $20 — to ask a NewNew creator to do something of their choosing, such as naming a character in a book after them. But the creator can reject all of these “bids”, and if they do so then the follower doesn’t have to part with the money…

Co-founder and chief executive Ms Smith, a 33-year-old Canadian, has big plans for NewNew, and has some heavyweight backers. Investors include Peter Thiel, the billionaire co-founder of PayPal, and the first outside person to put money into Facebook. Others with a stake in the business include leading US tech investment fund Andreessen Horowitz, and Hollywood actor Will Smith (no relation to Courtne). Snapchat has also given technical support.

Source link

قالب وردپرس

Continue Reading

African News

Sandpapergate will haunt Australia cricket forever: ex-bowling coach

Published

on

By

Cameron Bancroft. (Photo by Brenton Geach - Gallo Images/Getty Images)


Cameron Bancroft. (Photo by Brenton Geach – Gallo Images/Getty Images)

The 2018 ball-tampering scandal will haunt Australian cricket forever, much like the infamous underarm delivery of 40 years ago, the team’s former bowling coach David Saker said on Monday.

Saker was responding to opening batsman Cameron Bancroft suggesting that Australia’s bowlers knew about the plan in Cape Town to alter the ball which earned him a nine-month ban and rocked the game.

Saker was Australia’s bowling coach when Bancroft was caught trying to rough up the ball with sandpaper during the third Test against South Africa.

While refusing to be drawn on who knew what, Saker said “the finger-pointing is going to go on and on and on”.

“It’s like the underarm, it’s never going to go away,” he told Fairfax Media, referring to a 1981 incident when Trevor Chappell bowled underarm to ensure New Zealand lost a one-day match at the Melbourne Cricket Ground.

The notorious delivery is still cited in New Zealand and in cricketing circles as a prime example of unsporting conduct.

However, the ball-tampering scandal – dubbed “sandpapergate” – had a greater impact on Australian cricket, with the then-captain Steve Smith and his deputy David Warner suspended for a year from all cricket and stripped of their leadership roles.

Darren Lehmann also quit as coach and all the top brass from Cricket Australia left after a scathing review blasted their “arrogant and controlling” win-at-all-costs culture.

No one else among the team or coaching staff was held to account but Bancroft’s remarks in an interview with The Guardian newspaper hinted that the team’s bowlers at least knew about the plan.

“Obviously what I did benefits bowlers and the awareness around that, probably, is self-explanatory,” he said.

Saker added: “There was a lot of people to blame. It could have been me to blame, it could have been someone else. It could have been stopped and it wasn’t, which is unfortunate.

“Cameron’s a very nice guy. He’s just doing it to get something off his chest … He’s not going to be the last.”

In response, Cricket Australia said that if anyone had new information, they would look into it.

Saker said he was not opposed to a fresh investigation but added “I just don’t know what they’re going to find out.”

Source link

قالب وردپرس

Continue Reading

African News

Mexico’s Andrea Meza crowned Miss Universe

Published

on

By

Miss Universe Andrea Meza


Miss Universe Andrea Meza

UPDATE:

MISS UNIVERSE 2020/2021 IS ANDREA MEZA FROM MEXICO:


UPDATE:

THE MISS UNIVERSE 2020/2021 TOP 5:

1. Mexico

2. India

3. Brazil

4. Dominican Republic

5. Peru


UPDATE:

HERE ARE THE MISS UNIVERSE 2020/2021 TOP 10 CONTESTANTS:

1. Jamaica 

2. Dominican Republic 

3. India

4. Peru 

5. Australia 

6. Puerto Rico

7. Thailand

8. Costa Rica

9. Mexico

10. Brazil


UPDATE:

MISS UNIVERSE TOP 21 IN SWIMWEAR:


UPDATE:

MISS UNIVERSE TOP 21: 

1. Columbia

2. Peru 

3. Australia 

4. France

5. Myanmar

6. Jamaica 

7. Mexico 

8. Dominican Republic 

9. USA

10. Indonesia 

11. Argentina 

12. India

13. Curaçao

14. Puerto Rico

15. Phillipines 

16. Brazil

17. Great Britain

18. Nicaragua

19. Thailand 

20. Costa Rica

21. Vietnam


 UPDATE:

MISS UNIVERSE SOUTH AFRICA NATASHA JOUBERT WALKS THE STAGE AT MISS UNIVERSE 2020/2021:


74 contestants will compete for the title of Miss Universe on 16 May in Hollywood, Florida. 

The Miss Universe pageant takes place on 16 May in the US (02:00 to 05:00 on 17 May SA time). The show will be broadcast live on 1 Magic (DStv Channel 103) with a repeat at 21:30. 

Reigning Miss Universe Zozibini Tunzi of South Africa will crown her successor at the end of the event.

Representing South Africa is Natasha Joubert, and South Africans are hoping for the “magic double” – back-to-back consecutive wins, which has only happened once before in the pageant’s history.

Natasha wowed crowds at the national costume competition last week and on Friday impressed during the preliminary round

We live in a world where facts and fiction get blurred

In times of uncertainty you need journalism you can
trust. For only R75 per month, you have access to
a world of in-depth analyses, investigative journalism,
top opinions and a range of features. Journalism
strengthens democracy. Invest in the future today.

Source link

قالب وردپرس

Continue Reading

African News

Miss Mexico crowned Miss Universe 2021

Published

on

By

By AFP Time of article published 16m ago

Share this article:

Washington – Miss Mexico was crowned Miss Universe on Sunday in Florida, after fellow contestant Miss Myanmar used her stage time to draw attention to the bloody military coup in her country.

Sunday night marked the Miss Universe competition’s return to television, after the pageant was cancelled in 2020 for the first time due to the coronavirus pandemic.

Andrea Meza, 26, finished first ahead of the Brazilian and Peruvian finalists in a flashy televised event, hosted by American actor Mario Lopez and television personality Olivia Culpo.

Former Miss Universe contestants Cheslie Kryst, Paulina Vega and Demi-Leigh Tebow (who won the title in 2017) served as competition analysts and commentators, and a panel of eight women determined the winner.

Dressed in a sparkling red evening gown, Meza tearfully walked the catwalk as Miss Universe for the first time, before rushing back for a group hug with the other competitors.

Meza beat more than 70 contestants from around the globe in the 69th installment of Miss Universe, which was held at the Hard Rock Hotel & Casino in Hollywood, Florida.

In the days leading up to the final competition, Miss Myanmar Thuzar Wint Lwin, who made the top 21, made waves when she used her time in the spotlight to bring attention to the coup in her country.

“Our people are dying and being shot by the military every day,” she said during her biographical video, which showed photos of her taking part in the anti-coup protests. “Therefore I would like to urge everyone to speak out about Myanmar.”

Natasha Joubert, Miss Universe South Africa 2020 competes on stage in Ema Savahl swimwear during the MISS UNIVERSE® Preliminary Competition.

She also won the award for best national costume: during that competition segment on Thursday, she wore an outfit beaded in traditional Burmese patterns and held up a sign that said, “Pray for Myanmar.”

Myanmar has been in uproar since February 1, when the army ousted civilian leader Aung San Suu Kyi.

At least 796 people have been killed by security forces since then, according to a local monitoring group, while nearly 4 000 people are behind bars.

Miss Singapore Bernadette Belle Ong – who did not make the top 21 – also used the national costume portion to make a political statement.

Dressed in a glittering red bodysuit and matching thigh-high boots, she turned around to reveal her cape – in the colours of the Singaporean flag – was painted with the words “Stop Asian Hate.”

“What is this platform for if I can’t use it to send a strong message of resistance against prejudice and violence?” she wrote on Instagram alongside pictures of her outfit.

The United States in particular has seen a surge in anti-Asian violence in the past year, which activists have blamed on former president Donald Trump’s rhetoric, especially his repeated description of Covid-19 as the “China virus.”

The pageant has also drawn criticism in the past for objectifying the contestants.

In recent years, the competition has shifted image, focusing more on female empowerment and activism.

Source link

قالب وردپرس

Continue Reading

popcaan