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Were trebuchets built in situ and then abandoned after a siege?

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While many classical pieces explored celestrial or planetary themes before Holst (pictured), few were as thorough or systematic as The Planets
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Early trebuchets were built on site. As they grew increasingly large and powerful, wagons carrying sections of prefabricated trebuchets were brought to a siege and assembled in situ.

A trebuchet was a medieval siege weapon, operated using a counterweight to propel a long arm, attached to a sling, which could hurl a projectile with great force and accuracy at enemy fortifications.

Invented in China in around the fourth century BC, by the 12thcentury, improved counterweight trebuchets were in use in Europe.

Historian Michael S. Fulton offered the best examination of the machines in his book Development Of Prefabricated Artillery During The Crusades (2015).

He concluded that while smaller weapons were built on site, large trebuchets were not only assembled but also disassembled afterwards for transport so they could be reused at later sieges.

Perhaps the largest and most famous trebuchet of them all was Edward I’s Warwolf.

In 1304, he ordered his engineers to build this great piece of artillery for the siege of Stirling Castle in Scotland.

Assembled by five master carpenters and 49 labourers, the Warwolf could hurl rocks weighing as much as 300lb.

Early trebuchets were brought on site. As they grew larger and more powerful, wagons carried prefabricated section to a siege and assembled in situ

 

The Scots, watching the Warwolf being assembled, offered to surrender, but Edward reputedly refused to let anyone leave the castle until the great engine had bombarded it, which it did, successfully levelling the curtain wall.

Jon Francis, Norwich, Norfolk

QUESTION: What did the Keeper of the King’s Conscience do?

The Keeper of the King’s Conscience was a role of the Lord Chancellor. Historically, the Lord Chancellor was head of the Chancery, a court of equity (using fairness to resolve disputes) that originated in medieval England.

In its earliest form, those who were unable to obtain an adequate common law remedy (law derived from judicial decision), or felt they had been treated unfairly, could petition the King of England directly. Rather than making the judgment himself, he would refer the case to his ‘Conscience’, i.e. the Lord Chancellor.

Up until the Reformation the Chancellors were almost always churchmen, versed in civil and canon law. The Chancellor could thus bring legal and spiritual judgment to bear upon the case.Afterwards, the Chancellors were usually trained lawyers used to the process of reasoning.

Sarah Westwood, Birmingham

QUESTION: Was Gustav Holst the first composer to write about the planets?

Before Holst, there were works that explored celestial or planetary themes, though not in such a thorough or systematic manner as The Planets (1914-1917).

Orlando di Lasso (c.1532-1594) was a Catholic composer born in Mons in the Habsburg Netherlands (modern-day Belgium).

While many classical pieces explored celestrial or planetary themes before Holst (pictured), few were as thorough or systematic as The Planets

 

One of the most prolific, versatile and universal composers of the Renaissance, Lasso wrote more than 2,000 songs in Latin, French, Italian and German. Among his works was In Me Transierunt Irae Tuae (Your Wrath Swept Over Me), which directly inspired the German mathematician Johannes Kepler (1571-1630) to write Harmonices Mundi (Harmonies Of The World).

Tomorrow’s questions

Q: Has there ever been a report of a shark attack off the UK coastline?

Mrs Glenda Hunt, Newcastle upon Tyne

Q: Did US actor Joe Don Baker appear in a British feature film about defrosting a fridge?

Vernon Ireland, Lancing, West Sussex

Q: What is a ‘frozen conflict’?

Simon Brown, Southampton

Harmonices Mundi captured the Pythagorean idea of planetary motion and the ‘music of the spheres’: the philosophical concept that celestial bodies such as the Sun, the Moon and the planets form music as they move through the solar system.

Austrian composer Joseph Haydn’s great oratorio The Creation (1798) celebrated the formation of the Universe. Although the lyrics were based on the biblical books of Genesis and Psalms, and John Milton’s Paradise Lost, Haydn was intensely interested in the astronomical discoveries of the day.

He is believed to have read Immanuel Kant’s Universal Natural History And Theory Of The Heavens (1755), which introduced Nebular Theory, the idea that the planets coalesced from gas and dust orbiting the Sun. The theory, as refined by French mathematician Pierre-Simon Laplace in the 1790s, was popular in the intellectual salons of the era.

Haydn also visited William Herschel’s astronomical observatory in Slough in June 1792. Peering through Herschel’s 40ft telescope may have provided the cosmic inspiration for The Representation of Chaos, the famous opening of The Creation.

It brilliantly captures the formation of celestial spheres from chaos, and it is clear from Haydn’s sketches that he took unprecedented pains over this composition.

Dr Ken Bristow, Glasgow

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Nigerian mobile network changes name

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Nigerian telecom operator 9mobile formerly Etisalat has changed its name to T2.

The unveiling to a new brand identity was announced during a corporate event tagged Tech Meets Tenacity at Eko Hotels and Suites in Lagos.

The transformation also comes with a new orange colour scheme, replacing the company’s longtime green branding.

The Chief Executive Officer, Obafemi Banigbe, said the move was aimed at redefining the company’s position in Nigeria’s telecom market and competing more strongly in the industry.

The event was attended by key stakeholders, including the Minister of Communications and Digital Economy, Dr. Bosun Tijani, and featured musical performances, with entertainment personality Darey Art Alade as host.

The rebrand marks another chapter in the company’s history.

Originally launched as Etisalat Nigeria, the firm once had over 22 million subscribers before financial challenges and loss of investors reduced its active users to 3.2 million by January 2025.

In recent months, it signed a national roaming agreement with MTN Nigeria to improve coverage and service quality.

The shift from 9mobile to T2 is part of a broader plan to stabilise operations, attract more customers, and remain competitive in Nigeria’s fast-changing telecommunications sector.

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BREAKING: MTN and Airtel Nigerian network subscribers spent a total of N2.53 trillion on voice and data services in the first half of 2025

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An illustrative photo of people holding a smartphone

Subscribers on MTN and Airtel networks spent a total of N2.53tn on voice and data services in the first half of 2025, representing a 50.9 per cent increase from the N1.68tn recorded in the corresponding period of 2024.

This is according to an analysis of the half-year 2025 results released by both telcos.

The figure reflects rising consumer spending on telecommunications, driven by tariff reviews, increased smartphone penetration and sustained network investment by the two largest mobile network operators in Nigeria.

MTN Nigeria generated N2.12tn in voice and data revenue between January and June 2025, marking a 55.7 per cent increase from the N1.36tn recorded in H1 2024.

The telco’s data revenue surged by 69.2 per cent to N1.23tn, up from N727.33bn in the same period last year.

Voice revenue also grew by 40.3 per cent year-on-year to reach N887.13bn, compared to N632.38bn previously.

The company attributed the performance to robust demand, price adjustments implemented largely in the second quarter, and continued growth in its active data user base.

MTN reported an 11.8 per cent increase in active data subscribers to 51 million, while total mobile subscribers rose by 6.7 per cent to 84.7 million.

Average data consumption per subscriber increased by 26.3 per cent to 13.2 gigabytes, supported by smartphone penetration of 62.6 per cent and a 41.2 per cent rise in data traffic.

The telco also executed a price review across voice and data plans during the period, which boosted service revenue.

The strong topline performance helped MTN swing from a loss of N519.1bn in H1 2024 to a profit after tax of N414.9bn in H1 2025.

Earnings before interest, tax, depreciation and amortisation more than doubled, rising by 119.5 per cent to N1.2tn, with the EBITDA margin improving to 50.6 per cent.

The company has since revised its full-year guidance, forecasting service revenue and EBITDA margin growth of at least 50 per cent.

Airtel Nigeria, meanwhile, recorded a total of $298 million in data and voice revenue during the same six-month period.

Using the exchange rate of N1,384/$ adopted by the company, this amounts to N412.43bn—an increase of 30.1 per cent over the N316.94bn reported in H1 2024.

Airtel’s data revenue grew by 40.2 per cent year-on-year, rising from $117 million (N161.93bn) to $164 million (N226.98bn), while voice revenue rose by 19.1 per cent from $112 million (N155.01bn) to $134 million (N185.46bn).

The growth was underpinned by an 11.3 per cent rise in Airtel Nigeria’s data subscriber base to 29.3 million and a 46.8 per cent increase in data average revenue per user.

Data usage per subscriber climbed to 9.3GB monthly, up from 7.3GB in the previous year, while smartphone penetration rose to 51.4 per cent.

The company’s overall customer base grew by 6.3 per cent to 53.6 million by June 2025 in Nigeria.

Airtel Nigeria’s EBITDA rose by 49.9 per cent year-on-year to $185 million, and its EBITDA margin expanded to 55.7 per cent, supported by strong topline performance and the continuation of its cost efficiency strategy.

Although the company was impacted by currency devaluation in the previous year, its financial position improved in 2025, with increased profitability and stronger operating cash flows.

Both MTN and Airtel noted that macroeconomic conditions had become more stable during the first half of the year.

The Central Bank of Nigeria maintained the monetary policy rate at 27.5 per cent, helping to moderate inflation to 22.2 per cent by June 2025.

The naira also held steady around N1,530 to the US dollar, providing a more favourable environment for financial planning and capital investment.

In his commentary on the H1 result, the CEO of MTN Nigeria, Karl Toriola, said “We maintained strong commercial momentum in H1 2025 through disciplined execution, targeted customer engagement and network investments.

“Our mobile subscribers rose to 84.7 million, with a net addition of 3.8 million in H1; despite the impact of the new SIM registration regulations introduced in Q1. As we increase our effort to add more strategic agents, we anticipate an easing of this headwind as we move forward. Active data users rose by 3.3 million in H1 to approximately 51 million, driving a 41.2 per cent YoY increase in data traffic.

“During the period, we completed the phased implementation of the new price adjustments across voice and data bundles, largely benefiting Q2. Pleasingly, the demand for our services remained resilient, which supported strong service revenue growth in the period.”

MTN said it had launched the first phase of its Dabengwa Tier III Data Centre and was onboarding mobile virtual network operators to its infrastructure, in line with the NCC’s efforts to deepen competition and improve nationwide connectivity.

Toriola noted, “As part of our strategy to expand capacity and meet the growing demand for our services, we launched the first phase of our US$240 million Dabengwa Tier 3 Data Centre in July 2025. This multi-stage data centre project is a world-class facility that will become the largest of its kind in West Africa. It will deliver industry-leading standards of scalability, reliability and security. It will enable businesses to digitise operations, drive innovation and scale efficiently.”

Airtel also highlighted its partnership with SpaceX to deliver Starlink’s high-speed satellite broadband services to remote communities across Africa, including Nigeria.

It noted, “On 5 May 2025, the Company announced an agreement with SpaceX to bring Starlink’s high-speed internet services to its customers in Africa.

“With this collaboration, Airtel Africa will further enhance its next generation satellite connectivity offerings and augment connectivity for enterprises, businesses and socio-economic communities like school, health centres etc in most rural parts of Africa.

“Currently, SpaceX has acquired the necessary licences in nine out of 14 countries within Airtel Africa’s footprint and operating licences for the other five countries are under process.”

The combined N2.53tn spent on telecom services in just six months highlights the critical role played by voice and data connectivity in Nigeria’s economy.

With expanding networks, increasing demand for digital content, and deeper smartphone adoption, telecoms are poised to remain one of the fastest-growing sectors in the country’s post-pandemic recovery.

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‘Sorry’ – Elon Musk apologies, addresses Starlink satellite global outage

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United States of America tech billionaire Elon Musk has apologised after his firm, SpaceX Starlink, a satellite internet provider, suffered a 2.5-hour disruption of high-speed internet service globally on Thursday night.

Musk, in a post via his X account, said he was “sorry” as he addressed the issue.

Recall that SpaceX’s Starlink satellite internet suffered one of its biggest international outages, knocking tens of thousands of users offline.

 

This came as a result of a failure of internal software services.

Reacting, Musk promised that SpaceX will resolve the root cause and make sure it doesn’t happen again in the future.

“Sorry for the outage. SpaceX will remedy root cause to ensure it doesn’t happen again,” Musk wrote.

SpaceX has launched more than 8,000 Starlink satellites since 2020.

In Nigeria, Starlink officially resumed activations for customers nationwide last month.

According to the US firm, high-demand customers in Lagos and Abuja, among other cities, are at the forefront of its revival.

Recall that between October and November last year, Starlink temporarily paused activations of new customers over regulatory approvals.

This followed the internet company, with over 60,000 subscribers, arbitrarily increasing its subscription prices without the Nigerian Communications Commission’s approval in October 2024.

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