135 articles from MONDAY 2.5.2022

Australian researchers uncover clue to rare and severe response to Covid in children

Breakthrough could improve diagnosis and lead to development of treatment for condition that has baffled doctors for two yearsFollow our Australia news live blog for the latest updatesDownload the free Guardian app; get our morning email briefingIn the first months after Covid emerged, doctors were baffled by rare and severe responses to the virus in some children, whose symptoms included lung...

'Lungs of the Mediterranean' at risk

Under the Mediterranean waters off Tunisia, gently waving green seagrass meadows provide vital marine habitats for the fishing fleets and an erosion buffer for the beaches the tourism industry depends on.

Can you solve it? Are you a match for Britain’s teenage geniuses?

Smash this perplexing ping pong poserToday’s puzzle appeared in last year’s British Mathematical Olympiad (BMO), a competition taken by almost 2,000 school pupils in the UK.The BMO is the top national maths contest for pre-university students, and is part of the selection process for the British team at the International Mathematical Olympiad and the European Girls’ Mathematical Olympiad....

Starwatch: Mercury is the big prize in a delightful trio

A wafer-thin crescent moon will have Aldebaran and the inner planet for companyClose out the UK bank holiday with an absolutely delightful sight this evening.Around 21.00 BST, a wafer-thin crescent moon will hang between the star Aldebaran and the planet Mercury. Begin your search as twilight begins to fall, and look low towards the western horizon. By 9pm, you should be able to see the three...

Songs, tears and reunions: New Zealand welcomes back visitors as border reopens after two years

Vaccinated people from about 60 visa-waiver countries now able to enter as part of pandemic reopening planCoronavirus – latest updatesMāori songs, tearful embraces and a beloved New Zealand chocolate bar awaited international visitors arriving in New Zealand on Monday – the first foreign guests, other than Australians, to set foot in Aotearoa in more than two years.Since March 2020, the...