Space dust grains may have carried water to Earth as the planet formed, a new study has found.
For decades, scientists have been trying to learn the source of Earth’s oceans, which cover 71 per cent of the planet.
It was always believed that water-carrying space rocks, known as C-type asteroids, could have brought water 4.6 billion years ago.
Now, a study by an international team of scientists shows that there could be more than one source.
A team led by the University of Glasgow studied samples from Itokawa, a small S-type asteroid, collected by Japanese space probe Hayabusa, which returned to Earth in 2010.
Solar wind played a part
The findings, published in the Nature Astronomy journal, showed a significant amount of water was produced below the surface of dust-sized grains from Itokawa by space weathering – which occurs when charged particles from the Sun, known as solar wind, change the chemical composition of the grains to produce water molecules.
Research suggests that this water-rich dust would have rained down alongside the C-type asteroids and created the Earth’s oceans.
“As recently as a decade ago, the notion that solar wind irradiation is relevant to the origin of water in the solar system, much less relevant to Earth's oceans, would have been greeted with scepticism,” said Prof John Bradley of the University of Hawaii at Manoa, Honolulu, a co-author of the paper.
“By showing for the first time that water is produced in situ on the surface of an asteroid, our study builds on the accumulating body of evidence that the interaction of the solar wind with oxygen-rich dust grains does indeed produce water."
The team used a technique known as "atom probe tomography" to measure the atomic structure of the grains one atom at a time and detect individual water molecules.
Prof Michelle Thompson, another co-author, said these kinds of measurements would not have been possible without the technology.
“It gives us an extraordinary insight into how tiny dust particles floating in space might help us balance the books on the isotopic composition of the Earth’s water and give us new clues to help solve the mystery of its origins,” she said.
Water was previously discovered on the Itokawa asteroid but the process of space weathering gives newer insights into Earth's oceans.
Discovery could help future space missions
The team believes the findings suggest a way by which space explorers could secure a water source even on dry planets.
It is expensive to launch water into space and scientists are hopeful that future astronauts will be able to produce water supplies on site when exploring the Moon or other planets one day.
“One of the problems of future human space exploration is how astronauts will find enough water to keep them alive and accomplish their tasks without carrying it with them on their journey,” co-author Prof Hope Ishii said.
“We think it’s reasonable to assume that the same space-weathering process which created the water on Itokawa will have occurred to one degree or another on many airless worlds like the Moon or the asteroid Vesta.
“That could mean that space explorers may well be able to process fresh supplies of water straight from the dust on the planet’s surface. It’s exciting to think that the processes which formed the planets could help to support human life as we reach out beyond Earth.”
UAE squad v Australia
Rohan Mustafa (C), Ashfaq Ahmed, Chirag Suri, Rameez Shahzad, Fahad Nawaz, Amjed Gul, Shaiman Anwar, Ahmed Raza, Imran Haider, Muhammad Naveed, Amir Hayat, Ghulam Shabir (WK), Qadeer Ahmed, Tahir Latif, Zahoor Khan
Avatar: Fire and Ash
Director: James Cameron
Starring: Sam Worthington, Sigourney Weaver, Zoe Saldana
Rating: 4.5/5
The line up
Friday: Giggs, Sho Madjozi and Masego
Saturday: Nas, Lion Bbae, Roxanne Shante and DaniLeigh
Sole DXB runs from December 6 to 8 at Dubai Design District. Weekend pass is Dh295 while a one day pass is Dh195. Tickets are available from www.soledxb.com
The%20specs
%3Cp%3E%3Cstrong%3EPowertrain%3A%20%3C%2Fstrong%3ESingle%20electric%20motor%0D%3Cbr%3E%3Cstrong%3EPower%3A%20%3C%2Fstrong%3E201hp%0D%3Cbr%3E%3Cstrong%3ETorque%3A%20%3C%2Fstrong%3E310Nm%0D%3Cbr%3E%3Cstrong%3ETransmission%3A%20%3C%2Fstrong%3ESingle-speed%20auto%0D%3Cbr%3E%3Cstrong%3EBattery%3A%20%3C%2Fstrong%3E53kWh%20lithium-ion%20battery%20pack%20(GS%20base%20model)%3B%2070kWh%20battery%20pack%20(GF)%0D%3Cbr%3E%3Cstrong%3ETouring%20range%3A%20%3C%2Fstrong%3E350km%20(GS)%3B%20480km%20(GF)%0D%3Cbr%3E%3Cstrong%3EPrice%3A%20%3C%2Fstrong%3EFrom%20Dh129%2C900%20(GS)%3B%20Dh149%2C000%20(GF)%0D%3Cbr%3E%3Cstrong%3EOn%20sale%3A%3C%2Fstrong%3E%20Now%3C%2Fp%3E%0A
Seemar’s top six for the Dubai World Cup Carnival:
1. Reynaldothewizard
2. North America
3. Raven’s Corner
4. Hawkesbury
5. New Maharajah
6. Secret Ambition
SPECS
%3Cp%3EEngine%3A%20Supercharged%203.5-litre%20V6%0D%3Cbr%3EPower%3A%20400hp%0D%3Cbr%3ETorque%3A%20430Nm%0D%3Cbr%3EOn%20sale%3A%20Now%0D%3Cbr%3EPrice%3A%20From%20Dh450%2C000%0D%3Cbr%3E%3C%2Fp%3E%0A
Jawan
%3Cp%3E%3Cstrong%3EDirector%3A%20%3C%2Fstrong%3EAtlee%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EStars%3A%3C%2Fstrong%3E%20Shah%20Rukh%20Khan%2C%20Nayanthara%2C%20Vijay%20Sethupathi%26nbsp%3B%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3ERating%3A%20%3C%2Fstrong%3E4%2F5%3C%2Fp%3E%0A
The 12 Syrian entities delisted by UK
Ministry of Interior
Ministry of Defence
General Intelligence Directorate
Air Force Intelligence Agency
Political Security Directorate
Syrian National Security Bureau
Military Intelligence Directorate
Army Supply Bureau
General Organisation of Radio and TV
Al Watan newspaper
Cham Press TV
Sama TV
DUBAI%20BLING%3A%20EPISODE%201
%3Cp%3E%3Cstrong%3ECreator%3A%20%3C%2Fstrong%3ENetflix%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EStars%3A%20%3C%2Fstrong%3EKris%20Fade%2C%20Ebraheem%20Al%20Samadi%2C%20Zeina%20Khoury%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3ERating%3A%3C%2Fstrong%3E%202%2F5%3C%2Fp%3E%0A
Arabian Gulf League fixtures:
Friday:
- Emirates v Hatta, 5.15pm
- Al Wahda v Al Dhafra, 5.25pm
- Al Ain v Shabab Al Ahli Dubai, 8.15pm
Saturday:
- Dibba v Ajman, 5.15pm
- Sharjah v Al Wasl, 5.20pm
- Al Jazira v Al Nasr, 8.15pm
How to watch Ireland v Pakistan in UAE
When: The one-off Test starts on Friday, May 11
What time: Each day’s play is scheduled to start at 2pm UAE time.
TV: The match will be broadcast on OSN Sports Cricket HD. Subscribers to the channel can also stream the action live on OSN Play.
Skoda Superb Specs
Engine: 2-litre TSI petrol
Power: 190hp
Torque: 320Nm
Price: From Dh147,000
Available: Now
RESULT
Al Hilal 4 Persepolis 0
Khribin (31', 54', 89'), Al Shahrani 40'
Red card: Otayf (Al Hilal, 49')
Why it pays to compare
A comparison of sending Dh20,000 from the UAE using two different routes at the same time - the first direct from a UAE bank to a bank in Germany, and the second from the same UAE bank via an online platform to Germany - found key differences in cost and speed. The transfers were both initiated on January 30.
Route 1: bank transfer
The UAE bank charged Dh152.25 for the Dh20,000 transfer. On top of that, their exchange rate margin added a difference of around Dh415, compared with the mid-market rate.
Total cost: Dh567.25 - around 2.9 per cent of the total amount
Total received: €4,670.30
Route 2: online platform
The UAE bank’s charge for sending Dh20,000 to a UK dirham-denominated account was Dh2.10. The exchange rate margin cost was Dh60, plus a Dh12 fee.
Total cost: Dh74.10, around 0.4 per cent of the transaction
Total received: €4,756
The UAE bank transfer was far quicker – around two to three working days, while the online platform took around four to five days, but was considerably cheaper. In the online platform transfer, the funds were also exposed to currency risk during the period it took for them to arrive.
Trump v Khan
2016: Feud begins after Khan criticised Trump’s proposed Muslim travel ban to US
2017: Trump criticises Khan’s ‘no reason to be alarmed’ response to London Bridge terror attacks
2019: Trump calls Khan a “stone cold loser” before first state visit
2019: Trump tweets about “Khan’s Londonistan”, calling him “a national disgrace”
2022: Khan’s office attributes rise in Islamophobic abuse against the major to hostility stoked during Trump’s presidency
July 2025 During a golfing trip to Scotland, Trump calls Khan “a nasty person”
Sept 2025 Trump blames Khan for London’s “stabbings and the dirt and the filth”.
Dec 2025 Trump suggests migrants got Khan elected, calls him a “horrible, vicious, disgusting mayor”
