829,930 articles

Can you solve it? Russia’s Prime Minister sets a geometry puzzle

The ruler with a rulerEarlier this month, Russia’s Prime Minister, Mikhail Mishustin, marked the first day of the school year by visiting a sixth form maths class at one of his country’s top science-oriented schools.The class was studying a problem about business. “Why do you guys need to do business projects in [school]?” he asked. “Fundamental knowledge is needed here, right?”...

Leaving by staying: Dispersal decisions of young giraffes

Dispersal, the process where animals reaching sexual maturity move away from family, is important for maintaining genetic diversity and is key to the long-term persistence of natural populations. For most animals, this involves having to make risky journeys into the unknown in the hope of finding new communities in which to settle and reproduce. However, many animal societies—including those of...

Starwatch: the arrival of autumn brings the lovely harvest moon

This is the full moon closest to the autumn equinox, the day when the lengths of day and night are equalThis week watch for the beautiful harvest moon to rise above the horizon on Tuesday. The harvest moon is defined as the full moon closest to the autumnal equinox.This year, the equinox falls on the 22 September, and the moment of full moon takes place on 21 September at 00.54 BST. The moon will...

September full moon 2021: how to photograph the harvest moon on your phone or camera with the right settings

Guardian Australia picture editor Carly Earl explains the dos and don’ts of taking pictures of tonight’s full moonWith the September 2021 full moon rising, also known as the harvest moon, many people will pull out their mobile phones to try and take an Instagram-worthy picture, but unfortunately the moon is really challenging to get a great photo of.Two reasons: it is very far away and unless...


SUNDAY 19. SEPTEMBER 2021


Volcano erupts on Spain's Canary Islands

The Cumbre Vieja volcano erupted on Spain's Canary Islands on Sunday spewing out lava, ash and a huge column of smoke after days of increased seismic activity, sparking evacuations of people living nearby, authorities said.

‘Highly effective’ ovarian cancer treatment could help thousands of women

New drug combination shrunk tumours significantly in 46% of patients with treatment-resistant form of disease Thousands of women with ovarian cancer could benefit from a revolutionary drug combination after it was shown to shrink tumours in half of patients with an advanced form of the disease.The pair of drugs – which work together to block the signals cancer cells need to grow – could offer...

Elon Musk welcomes SpaceX crew home with $50m donation to charity

Four-person crew asked for the public’s help in reaching fundraising target of $200m for the children’s charity St JudeElon Musk surprised his first all-private crew of space tourists with a welcome home gift after their trailblazing trip to orbit ended on Saturday night: a $50m donation to the children’s charity St Jude. Related: ‘The point is ambition’: are we ready to follow Netflix...

Use of 10p statins in organ donation ‘could save thousands of lives’

Exclusive: NHS launching large trial of approach that could boost number of transplants and their success rateThousands of lives could be saved globally by giving patients a 10p statin before transplants, doctors have said, as the NHS launches the world’s largest clinical trial in organ donors.The medical breakthrough is predicted to dramatically increase the supply of organs for transplant....

Readers reply: why do humans cry when they are sad?

The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical conceptsI understand that tears flush away foreign objects from the eye. But what advantage does crying have when one is feeling sad (or happy)? Perhaps it is to signal an extreme of emotion, but then why would a solitary sad person...

Inspiration4 Crew Safely Splashes Down Off Florida Coast

CAPE CANAVERAL, Fla. — Four space tourists safely ended their trailblazing trip to orbit Saturday with a splashdown in the Atlantic off the Florida coast. Their SpaceX capsule parachuted into the ocean just before sunset, not far from where their chartered flight began three days earlier. The all-amateur crew was the first to circle the world without a professional astronaut. The...