Saturday 17 October 2026 · No. 2
Top Story Saudi Arabia and Yemen
At least 20 deaths at Saudi airports between October 6 and 11, officials say.
🧵 New to this story? Read the story so far →The Houthis, an Iran-aligned movement that has held Sanaa and parts of north-west Yemen since 2014, are fighting Saudi-backed Yemeni government forces. A UN-brokered truce, in place since 2022, has collapsed. After Sanaa’s airport was struck, the Houthi leader announced a tit-for-tat policy: “airports for airports, ports for ports, and a blockade for a blockade.”
The Saudi-backed Yemeni government says that strike aimed to stop an Iranian plane from landing in Sanaa. The Houthis have declared Saudi airports and airspace “legitimate targets,” except Mecca and Medina. They also say they hit Aramco facilities. Many of their claims could not be independently verified.
Saudi civil aviation authorities report at least 20 deaths and 356 injuries at airports between October 6 and 11. The deadliest strike, on October 10 at Riyadh’s King Khalid International Airport, killed at least 12 people, including an American. Dammam, Abha, Jazan and Najran airports were also hit. On Wednesday, the Saudi-led coalition said it intercepted another missile launched toward Riyadh.
The Houthis are a group in Yemen that is on Iran’s side. They have controlled Sanaa and parts of north-west Yemen since 2014. They are fighting Yemeni government forces backed by Saudi Arabia. A truce, or deal to stop fighting, began in 2022. It has now collapsed.
After Sanaa’s airport was struck, the Houthi leader made a warning. He said they would strike back “airports for airports.” The Houthis now call Saudi airports targets. They say Mecca and Medina are left out. Many of their claims could not be checked by others.
Saudi officials say at least 20 people died at airports between October 6 and 11. Another 356 people were hurt. The worst strike hit an airport in Riyadh on October 10. It killed at least 12 people.
World Ukraine
President Zelenskyy says at least 600,000 people are without power.
Late on October 13 and early on October 14, Russian ballistic missiles struck Kyiv. Ukraine’s prime minister, Serhii Koretskyi, said all three of the capital’s combined heat and power plants came under attack. These plants make electricity and heat for homes from the same fuel. Everyone at the plants was evacuated and no one there was injured.
President Zelenskyy said 26 energy sites were significantly damaged and at least 600,000 people had no electricity, with more blackouts possible. Koretskyi said facilities in Kyiv Oblast that supply the capital and central Ukraine were also hit.
The attack followed US President Donald Trump’s announcement of an “energy ceasefire.” Zelenskyy said Russia had not approved it, while Kremlin spokesman Dmitry Peskov would only say “Contacts are ongoing.” Ukraine has struck Russian refineries too.
Combined heat and power plants matter in cold countries because the heat left over from making electricity can be piped to warm buildings, so one strike can cut both at once. The casualty and grid figures here come from Ukrainian officials and were not independently confirmed in the reports we read. Repairs are under way, officials said.
On October 13 and 14, Russian missiles struck Kyiv. All three of the capital’s heat and power plants were attacked. These plants use one fuel to make both electricity and heat for homes. Everyone at the plants got out, and no one there was hurt.
President Zelenskyy said 26 energy sites were badly damaged. At least 600,000 people had no electricity. More blackouts may come. These numbers came from Ukrainian officials. They were not confirmed by others.
These plants matter in cold countries. Heat left over from making electricity is piped to warm buildings. So one strike can cut off both at once. Officials say repairs are under way.
Science & Tech Physics
A thorium-229 prototype in Vienna ran for over 24 hours with no outside adjustment.
Atomic clocks use the regular behaviour of electrons in atoms to keep time. A nuclear clock instead uses a change inside the nucleus, the dense core of an atom. Researchers at TU Wien and PTB Braunschweig built one around a thorium-229 crystal driven by a laser, and published the work in Nature.
The advance is a feedback loop: the system detects when the laser frequency drifts and corrects it automatically. The prototype stayed stable for over 24 hours without help. Its precision was about 1 part in 10^15, which the researchers describe as roughly one second in 30 million years.
It still trails the best optical atomic clocks. A preliminary search for dark matter with the clock found no significant signal. The work was led by Thorsten Schumm and Ekkehard Peik.
Why use a nucleus at all? Electrons in an atom are easily disturbed by stray electric and magnetic fields, while the nucleus is better shielded. The thorium-229 nucleus is unusual because a laser can nudge it between two energy states, which makes it a promising timekeeper. Researchers also see such clocks as a tool for testing whether the constants of nature change, which is why a dark-matter search was run even though it found no signal.
For students, the key idea is feedback: a measurement of the clock’s drift is fed back to correct the laser, much like a thermostat that keeps a room at a set temperature.
Atomic clocks keep time using electrons, tiny parts of atoms. A nuclear clock uses the nucleus instead. The nucleus is the dense core of an atom. It is better shielded from outside disturbances.
Researchers built one in Vienna with a thorium-229 crystal and a laser. A laser can nudge this nucleus between two energy states. That makes it a promising timekeeper.
The big step is a feedback loop. The system notices when the laser drifts. Then it corrects the laser by itself. A thermostat works the same way to keep a room at one temperature.
The clock stayed steady for over 24 hours without help. Its precision is roughly one second in 30 million years. It still trails the best atomic clocks. Better clocks could improve navigation.
Climate & Environment Atlantic
NOAA gives a 75% chance of a below-normal season.
NOAA’s August update raised the chance of a below-normal Atlantic hurricane season to 75%, up from 55% in May. It forecasts 7 to 13 named storms, 2 to 6 hurricanes and 0 to 2 major hurricanes.
The driver is El Niño, a warm phase in the tropical Pacific. NOAA gave a 90% chance of a strong or very strong El Niño during August, September and October. El Niño raises upper-level winds over the Atlantic, which disrupts storm development, and NOAA noted that every strong El Niño since 1950 has come with a below-normal Atlantic season.
NOAA’s administrator cautioned that “it only takes one” storm, and said category 5 storms have made landfall in below-average seasons.
The numbers need careful reading. A forecast is a set of probabilities, not a promise: a 75% chance of a below-normal season still leaves a 25% chance of something else, and ranges such as 0 to 2 major hurricanes show real uncertainty. NOAA’s August outlook updated its May one, which gave a 55% chance of a below-normal season.
The Atlantic season officially runs from June 1 to November 30, so the forecast still applies to the weeks ahead. The lesson for readers is to separate two questions that are easy to blur: how many storms will form, and where any one of them will go. El Niño helps with the first; it says little about the second.
Forecasters at NOAA now give a 75% chance of a below-normal Atlantic hurricane season. In May, they said 55%. They expect 7 to 13 named storms. Of those, 2 to 6 may become hurricanes.
The reason is El Niño. It is a warm phase in the tropical Pacific Ocean. It makes winds high above the Atlantic stronger. Those winds disrupt storms as they form. Every strong El Niño since 1950 has come with a below-normal Atlantic season.
A forecast gives chances, not promises. There is still a 25% chance of something else. NOAA’s leader warned that “it only takes one” storm. The season runs until November 30, so being prepared still matters.
Health Kenya
An imported case was confirmed on October 6; the outbreak is in DR Congo.
Kenya confirmed its first Ebola case on October 6. The patient was a Kenyan man who had lived in DR Congo and died in Nairobi after returning.
Officials began contact tracing: finding and monitoring people who were near a patient so any new illness can be caught early. Africanews reported that 28 contacts had been traced.
The wider outbreak is in DR Congo and is caused by the Bundibugyo strain. WHO declared it a public health emergency of international concern. One report in July counted more than 2,400 cases and nearly 1,000 deaths in Congo; later totals were not available to us.
Why does contact tracing matter? Ebola spreads through direct contact with the body fluids of a sick person, so the people most at risk are family members and health workers who cared for the patient. Finding them quickly, checking their health daily and isolating anyone who falls ill is a main way to stop a chain of infection.
Kenya’s case also shows how disease crosses borders: the patient had lived in DR Congo and died in Nairobi after returning. Each stage of such a journey is a point where contacts must be found, which makes the response both a local and a regional task. Contact tracing began as soon as the case was confirmed on October 6.
Kenya confirmed its first Ebola case on October 6. The patient was a Kenyan man who had lived in DR Congo. He died in Nairobi after returning.
Officials began contact tracing right away. That means finding people who were near a patient. Then they watch their health so any new illness is caught early. One report said 28 contacts had been traced.
Ebola spreads through direct contact with the body fluids of a sick person. So family members and health workers are most at risk. Finding them fast helps stop one case from becoming many.
The bigger outbreak is in DR Congo. WHO has declared it a health emergency of international concern.
History & Geography Chokepoints
Bab el-Mandeb and Hormuz are both under pressure at once.
OIL PRICES, OCTOBER 16 US dollars a barrel
A chokepoint is a narrow passage that traffic must squeeze through. The Strait of Hormuz, beside Iran, has effectively been closed by the Iran conflict since the US and Israel attacked Iran in late February, Yahoo Finance reports. Brent crude touched $110 a barrel after Iran escalated attacks there.
That raises the value of the Bab el-Mandeb strait, the southern exit of the Red Sea and a key route between the Mediterranean and Asia. The Houthis announced a blockade of Saudi vessels there. Control of the strait is disputed: a Reuters-based report said the Houthis had taken it, while pro-government forces say they have secured it.
On October 16, one market report put Brent at $107.83 a barrel and the US benchmark, WTI, at $97.07.
History explains why these straits matter. For centuries the narrow places where seas meet have been where trade is easiest to tax, defend or block, and today much of the world’s oil moves by ship. The SCMP reported that the Houthi blockade of Saudi vessels forced the kingdom to divert oil exports from Red Sea ports to Asia around Africa.
A chokepoint is a narrow passage that traffic must squeeze through. A strait is a narrow stretch of sea like this. The Strait of Hormuz is beside Iran. It has been closed in effect since the US and Israel attacked Iran in late February.
That makes the Bab el-Mandeb strait more important. It is the southern exit of the Red Sea. It is a key route between the Mediterranean and Asia. The Houthis announced a blockade of Saudi ships there. Who controls it is disputed.
On October 16, one report put the price of Brent oil at about $108 a barrel. Saudi Arabia has had to send oil from its Red Sea ports to Asia around Africa. When two routes are threatened at once, there is no easy detour.
Did you know?
Explainer
El Niño is a periodic warming of surface water in the tropical Pacific Ocean. It shifts rainfall and winds, and its effects reach far from the Pacific.
One effect, according to NOAA, is stronger upper-level winds over the Atlantic. Those winds make it harder for tropical storms to organise, which is why strong El Niño years tend to have fewer Atlantic hurricanes.
Discuss
Why might attackers choose airports and power plants as targets, and what do civilians lose?
Why can a narrow strait matter more to the world economy than a much larger sea?
What makes contact tracing work?
In brief
New words
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