Scientists who produced the first “living robots” say the life forms have found a way to reproduce.
The blob-like xenobots, which are less than a millimetre wide, were formed from the stem cells of the African clawed frog - xenopus laevis - from which they take their name.
They were first unveiled in 2020 after experiments showed they could move, work in groups and even heal themselves.
Now the US scientists who developed them say the xenobots have discovered an entirely new form of biological reproduction, different from any animal or plant known to science.
"I was astounded by it," said Michael Levin, a professor of biology and director of the Allen Discovery Centre at Tufts University, who was co-lead author of the new research.
"Frogs have a way of reproducing that they normally use but when you liberate (the cells) from the rest of the embryo and you give them a chance to figure out how to be in a new environment, not only do they figure out a new way to move, but they also figure out apparently a new way to reproduce."
"Most people think of robots as made of metals and ceramics but it's not so much what a robot is made from but what it does, which is act on its own on behalf of people," said Josh Bongard, a computer science professor and robotics expert at the University of Vermont and lead author of the study.
"In that way, it's a robot but it's also clearly an organism made from genetically unmodified frog cell."
Mr Bongard said the xenobots, which were initially sphere-shaped and made from around 3,000 cells, could replicate, but it happened rarely and only in specific circumstances.
The xenobots used "kinetic replication" - a process known to occur at the molecular level but has never been observed before at the scale of whole cells or organisms, Mr Bongard said.
With the help of artificial intelligence, the researchers then tested billions of body shapes to make the xenobots more effective at this type of replication.
The supercomputer came up with a C-shape that resembled Pac-Man, the 1980s video game. They found it was able to find tiny stem cells in a petri dish, gather hundreds of them inside its mouth, and a few days later the bundle of cells became new xenobots.
"The AI didn't program these machines in the way we usually think about writing code. It shaped and sculpted and came up with this Pac-Man shape," Mr Bongard said.
"The shape is, in essence, the program. The shape influences how the xenobots behave to amplify this incredibly surprising process."
The xenobots are very early technology and don't yet have any practical applications. However, this combination of molecular biology and artificial intelligence could potentially be used in a host of tasks in the body and the environment, according to the researchers. This may include things like collecting microplastics in the oceans, inspecting root systems and regenerative medicine.
The study was published in the peer-reviewed scientific journal PNAS on Monday.
Sri Lanka's T20I squad
Thisara Perera (captain), Dilshan Munaweera, Danushka Gunathilaka, Sadeera Samarawickrama, Ashan Priyanjan, Mahela Udawatte, Dasun Shanaka, Sachith Pathirana, Vikum Sanjaya, Lahiru Gamage, Seekkuge Prasanna, Vishwa Fernando, Isuru Udana, Jeffrey Vandersay and Chathuranga de Silva.
AUSTRALIA SQUAD
Aaron Finch, Matt Renshaw, Brendan Doggett, Michael Neser, Usman Khawaja, Shaun Marsh, Mitchell Marsh, Tim Paine (captain), Travis Head, Marnus Labuschagne, Nathan Lyon, Jon Holland, Ashton Agar, Mitchell Starc, Peter Siddle
What is a black hole?
1. Black holes are objects whose gravity is so strong not even light can escape their pull
2. They can be created when massive stars collapse under their own weight
3. Large black holes can also be formed when smaller ones collide and merge
4. The biggest black holes lurk at the centre of many galaxies, including our own
5. Astronomers believe that when the universe was very young, black holes affected how galaxies formed
The President's Cake
Director: Hasan Hadi
Starring: Baneen Ahmad Nayyef, Waheed Thabet Khreibat, Sajad Mohamad Qasem
Rating: 4/5
Hurricanes 31-31 Lions
Wellington Hurricanes:
Tries: Gibbins, Laumape, Goosen, Fifita tries, Barrett
Conversions: Barrett (4)
Penalties: Barrett
British & Irish Lions:
Tries: Seymour (2), North
Conversions: Biggar (2)
Penalties: Biggar (4)
MATCH INFO
Uefa Champions League final:
Who: Real Madrid v Liverpool
Where: NSC Olimpiyskiy Stadium, Kiev, Ukraine
When: Saturday, May 26, 10.45pm (UAE)
TV: Match on BeIN Sports
Red flags
- Promises of high, fixed or 'guaranteed' returns.
- Unregulated structured products or complex investments often used to bypass traditional safeguards.
- Lack of clear information, vague language, no access to audited financials.
- Overseas companies targeting investors in other jurisdictions - this can make legal recovery difficult.
- Hard-selling tactics - creating urgency, offering 'exclusive' deals.
Courtesy: Carol Glynn, founder of Conscious Finance Coaching
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How to help
Send “thenational” to the following numbers or call the hotline on: 0502955999
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Haemoglobin disorders explained
Thalassaemia is part of a family of genetic conditions affecting the blood known as haemoglobin disorders.
Haemoglobin is a substance in the red blood cells that carries oxygen and a lack of it triggers anemia, leaving patients very weak, short of breath and pale.
The most severe type of the condition is typically inherited when both parents are carriers. Those patients often require regular blood transfusions - about 450 of the UAE's 2,000 thalassaemia patients - though frequent transfusions can lead to too much iron in the body and heart and liver problems.
The condition mainly affects people of Mediterranean, South Asian, South-East Asian and Middle Eastern origin. Saudi Arabia recorded 45,892 cases of carriers between 2004 and 2014.
A World Health Organisation study estimated that globally there are at least 950,000 'new carrier couples' every year and annually there are 1.33 million at-risk pregnancies.
Dr Afridi's warning signs of digital addiction
Spending an excessive amount of time on the phone.
Neglecting personal, social, or academic responsibilities.
Losing interest in other activities or hobbies that were once enjoyed.
Having withdrawal symptoms like feeling anxious, restless, or upset when the technology is not available.
Experiencing sleep disturbances or changes in sleep patterns.
What are the guidelines?
Under 18 months: Avoid screen time altogether, except for video chatting with family.
Aged 18-24 months: If screens are introduced, it should be high-quality content watched with a caregiver to help the child understand what they are seeing.
Aged 2-5 years: Limit to one-hour per day of high-quality programming, with co-viewing whenever possible.
Aged 6-12 years: Set consistent limits on screen time to ensure it does not interfere with sleep, physical activity, or social interactions.
Teenagers: Encourage a balanced approach – screens should not replace sleep, exercise, or face-to-face socialisation.
Source: American Paediatric Association
