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Thousands of protestors have stormed President Gotabaya Rajapaska's residence in the capital of Sri Lanka. Demonstrators from all over the country have marched to Colombo demanding his resignation after months of protests over mismanagement of the country's economic crisis.

"Right now, we have two big battles," says Dmytro Podvorchanskyi, a soldier with Ukraine's Dnipro 1 Battalion. "The first is an artillery battle," he says, "the second is a battle of technologies". Dmytro is fighting that second, largely unseen war.

Crowded, misaligned and riddled with cavities and inflamed gums, our teeth are infamous for their flaws. The modern human is unique in the level of painstaking, daily intervention we need to make sure our teeth and gums don't become diseased.

An explosion early on Wednesday reduced one of the slabs at the Georgia Guidestones to rubble. CCTV footage showed a car leaving the scene and authorities are investigating.

Sri Lanka's president says he has asked Russia's Vladimir Putin to help his cash-strapped nation import fuel, as it faces its worst economic crisis since independence from Britain in 1948. Gotabaya Rajapaksa said he "had a very productive" discussion with Mr Putin.

It is 1919, and a young astronomer turns a street corner in Pasadena, California. Something seemingly humdrum on the ground distracts him. It's an ant heap. Dropping to his knees, peering closer, he has an epiphany – about deep time, our place within it, and humanity's uncertain fate.

The heads of UK and US security services have made an unprecedented joint appearance to warn of the threat from China. FBI director Christopher Wray said China was the "biggest long-term threat to our economic and national security" and had interfered in politics, including recent elections.

Arabs are losing faith in democracy to deliver economic stability across the Middle East and North Africa, according to a major new survey. Nearly 23,000 people were interviewed across nine countries and the Palestinian territories for BBC News Arabic by the Arab Barometer network.

When it comes to lowering the risk of developing skin cancer, childhood and adolescence are critical periods. The amount of sun exposure a person has in the first 20 years of their life determines to a substantial degree the likelihood of developing skin cancer, research shows.

Tom Adams is a detective. But he doesn't track criminals – his targets are "lost" apple varieties hiding unsuspected in orchards around the UK, and his work taps into a renewed British passion for its rich larder of heritage apples.

Vorige week schreef ik hoe je als ‘kantoor-boomer’ (ouwe zak) het beste kan omgaan met jonge collega’s. Nou, dat heb ik geweten. Iedereen boos. Woe-den-de reacties op Twitter en LinkedIn.

Scientists have found new ways in which quarks, the tiniest particles known to humankind, group together. The new structures exist for just a hundred thousandth of a billionth of a billionth of a second but may explain how our Universe is formed.

Brusselaar Lieve Polet richtte het bekende eetcafé Het Warm Water op in hartje Marollen. Ze was ook twintig jaar lang coördinator van het gemeenschapscentrum van Sint-Joost-ten-Node. Afgelopen week liet ze het leven na een noodlottige aanrijding door een vrachtwagen.

Twintig jaar geleden zette je een vacature op een website en dan kwamen er vanzelf hordes jonge mensen op af. Tegenwoordig mag je al blij zijn als er één verdwaalde millennial reageert op 63 pogingen, en dat die niet na twee jaar alweer weg is naar zijn volgende baan.

Because of the potential size of the future, the most important thing about our actions today might be their impact on future generations. This simple-sounding idea has some surprising moral implications: https://80000hours.org/kurzgesagt-last-human Sources & further reading: https://sites.google.c

In his apothecary shop in the historic neighbourhood of Bab al-Shaaria in the heart of Cairo, herbalist Rabea al-Habashi shows what he calls his "magical blends". Mr Habashi has made a name for himself selling aphrodisiacs and natural sexual enhancements in the Egyptian capital.

As children we are often told that sticks and stones can break bones, but words can never hurt. Yet with the benefit of experience, adults understand that this old proverb is far from true – while physical injuries can take a matter of weeks to heal, negative comments can scar us for a lifetime.

Image source, Photo: Yukon governmentA whole baby woolly mammoth has been found frozen in the permafrost of north-western Canada - the first such discovery in North America.The mummified ice age mammoth is thought to be more than 30,000 years old.

When Mount Vesuvius erupted nearly 2,000 years ago Pompeii's ancient residents were frozen in place by ash. So too it turns out were the city's flora and fauna - including a pregnant tortoise with her egg.

PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Space is pretty deadly. But is it so deadly that we’re effectively imprisoned in our s

Pictures being shared on social media showed injured people on stretchers, rubble and destruction of homes in Paktika province. The quake struck about 44km (27 miles) from the south-eastern city of Khost.

In 1863, in an effort to reduce street traffic, London opened the world’s first underground line, the Metropolitan Railway.

Get your Action Lab Box Now! https://www.theactionlab.com/ Follow me on Twitter: https://twitter.com/theactionlabman Facebook: https://www.facebook.com/theactionlabofficial In this video I show you what happens when you try to get close to 1 drop of a neutron star. I tell you how a neutron star is

PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Black holes are very real, but are also a theoretical nightmare. It turns out that in or