On Tuesday morning, at least eight attack drones entered Moscow's airspace before being shot down by the city's air defences, a few hitting residential buildings on the way down. The Russian government accused Ukraine of a "terrorist attack", which Kyiv officials wryly denied. "You know, we are being drawn into the era of artificial intelligence. Perhaps not all drones are ready to attack Ukraine and want to return to their creators and ask them questions like: 'Why are you sending us [to hit] the children of Ukraine? In Kyiv?'" Ukrainian presidential adviser Mykhailo Podolyak said on the YouTube breakfast show of exiled Russian journalist Alexander Plushev.

The Russian capital has been hit by a rare drone attack that has caused "minor" damage to buildings and no casualties, the city's mayor said. "This morning, at dawn, a drone attack caused minor damage to several buildings. All the city's emergency services are on the scene … No one has been seriously injured so far," Moscow's mayor Sergei Sobyanin said in a statement on Tuesday. Moscow, located more than 1,000km (620 miles) from Ukraine, has only rarely been the target of drone attacks since the start of the conflict in Ukraine, even though such attacks have become more common elsewhere in Russia. Andrei Vorobyov, governor of the Moscow region, said on the Telegram channel that several drones were shot down on their approach to Moscow. It was not immediately clear who launched the drones.

The waters in Venice's main canal have turned fluorescent green in the area near Italy's renowned Rialto Bridge, as authorities seek to determine the cause. Italy's fire department posted a video on Sunday as one of its boats sailed on phosphorescent waters. "The Grand Canal coloured in green is what the fire department found this morning as we intervened together with ARPAV to collect samples and analyse this abnormal colour," it said. ARPAV, Veneto's regional environmental protection agency, said it received samples of the altered waters and was working to identify the substance that changed their colour. The Venice prefect has called an emergency meeting of police forces to understand what happened and study possible countermeasures, the ANSA news agency reported.

Russia's southern Belgorod region came under attack from Ukrainian artillery fire, mortar shells and drones on Friday, authorities said, days after one of the most daring cross-border attacks since the war began. Hours earlier, two drones attacked a Russian city in a region next to the annexed Crimea Peninsula, officials said. The Kremlin's forces, meanwhile, attacked a medical clinic in Dnipro, in central Ukraine, killing a 69-year-old passer-by and another civilian. More than 20 others were wounded, including two children, Ukrainian officials said. Also, a Russian S-300 missile hit a dam in the Karlivka district of Ukraine's eastern Donetsk province, placing nearby settlements under threat of severe flooding.

United States regulators have given approval for Elon Musk's start-up Neuralink to test its brain implants on people. Neuralink said on Thursday that it received clearance from the US Food and Drug Administration (FDA) for the first human clinical study of implants which are intended to let the brain interface directly with computers. "We are excited to share that we have received the FDA's approval to launch our first-in-human clinical study," Neuralink said in a post on Twitter – which is owned by Musk. Neuralink prototypes, which are the size of a coin, have so far been implanted in the skulls of monkeys, demonstrations by the startup showed. With the help of a surgical robot, a piece of the skull is replaced with a Neuralink disk, and its wispy wires are strategically inserted into the brain, an early demonstration showed.

Nvidia Corp stock has soared about 26 percent, taking it closer to a market value of $1 trillion after the chip designer's stellar revenue forecast showed that Wall Street has yet to price in the game-changing potential of artificial intelligence. Thursday's surge added to a more than two-fold rise in the stock this year and was set to increase Nvidia's value by about $196bn to nearly $951bn, putting it on course for the largest single-day value gain for a US firm. That market capitalization makes Nvidia twice the size of the second-largest chip firm, Taiwan's TSMC. In the United States, it trails only the trillion-dollar value companies Apple Inc, Alphabet Inc, Microsoft Corp and Amazon.com The rosy earnings also sparked a rally in the chip sector and for AI-focused firms, lifting stock markets from Japan to Europe.

The conflict in Ukraine is about to enter a new high-intensity phase as Kyiv's troops gear up for an anticipated counteroffensive. Ukraine's persistent lobbying of allies has yielded significant results as NATO members have gradually relented to supplying high-tech weapons. The fighting in the coming weeks is likely to be bloody, as Ukraine aims to take back territory Russia took from it in the opening weeks of the invasion in 2022. What are these weapons, and why are they needed? More than 230 Western main battle tanks have been transferred to Ukraine, including United States-made Abrams M1s and British Challenger 2s.

I recently asked Bard, Google's conversational chatbot, whether artificial intelligence would replace teachers. Here's what it said, "It is unlikely that AI will completely replace teachers in the near future." During a poetry night, I remember joking with a friend that it takes a broken heart to nurture and heal another heart. I added, "Until AI experiences heartbreaks, we must trust human teachers to nurture the hearts and minds of the next generation." Yet it's hard to ignore the growing questions and concerns emerging from -- and about -- the teaching community on the impact of AI on their jobs, their classrooms and their very vocation.

Russia said it scrambled an Su-27 fighter jet to "prevent violations of the state border" by two United States Air Force strategic bombers flying over the Baltic Sea. Russia's Defence Ministry said in a statement on Tuesday that the military had prevented any border violation by the US planes and "the flight of the Russian fighter was carried out in strict accordance with international rules for the use of airspace". "After removing the foreign military aircraft from the Russian state border, the Russian fighter went back to its air base," the defence ministry said. "The crew of the Russian fighter classified the aerial targets as two US Air Force B-1B strategic bombers," it said. Pentagon spokesman Brigadier General Pat Ryder confirmed on Tuesday that US aircraft were intercepted by Russia, saying the B-1 bombers were taking part in a planned exercise in Europe and the Russian fighter's interaction with the US planes was "safe and professional".

Rapid advances in artificial intelligence (AI) such as Microsoft-backed OpenAI's ChatGPT are complicating governments' efforts to agree to laws governing the use of the technology. The government is consulting Australia's main science advisory body and is considering the next steps, a spokesperson for the industry and science minister said in April. The Financial Conduct Authority, one of several state regulators tasked with drawing up new guidelines covering AI, is consulting with the Alan Turing Institute and other legal and academic institutions to improve its understanding of the technology, a spokesperson said. Britain's competition regulator said on May 4 it would start examining the effect of AI on consumers, businesses and the economy, and whether new controls were needed. Britain said in March it planned to split responsibility for governing AI between its regulators for human rights, health and safety, and competition, rather than creating a new body. China's cyberspace regulator in April unveiled draft measures to manage generative AI services, saying it wanted firms to submit security assessments to authorities before they launch offerings to the public.