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For more than a century we have been broadcasting our presence to the cosmos. This year, the faintest signals from the world’s first major televised event – the Nazi-hosted 1936 Olympics – will have passed several potentially habitable planets.

If towing icebergs to hot, water-stressed regions sounds totally crazy to you, then consider this: the volume of water that breaks off Antarctica as icebergs each year is greater than the total global consumption of freshwater. And that stat doesn’t even include Arctic ice.

The Aka tribesmen in the Central African Republic often look after their young children while the mothers are out hunting. They soothe, clean and play with their babies, and spend more time holding them than fathers in any other society.

Conversation runs out quickly when talking to a newborn. They don’t say anything back. They won’t groan when you tell them it’s going to rain, or smile when you tell a joke. At the same time, those early weeks are shrouded in a cloud of exhaustion.

Three scientists have been awarded the 2019 Nobel Prize in Chemistry for the development of lithium-ion batteries. John B Goodenough, M Stanley Whittingham and Akira Yoshino share the prize for their work on these rechargeable devices, which are used for portable electronics.

It's the first time Shakil Afridi's case has been heard in open court. The judge adjourned the case until 22 October at the request of prosecutors. Dr Afridi's role was a huge embarrassment for Pakistan. He argues he was denied a fair trial.

One sweltering afternoon in July 1785, officials, dignitaries and a few infuriated gunsmiths gathered at the Château de Vincennes, a splendid castle to the east of Paris.

Three scientists have been awarded the 2019 Nobel Prize in Physics for "ground-breaking" discoveries about the Universe. James Peebles, Michel Mayor and Didier Queloz were announced as this year's winners at a ceremony in Stockholm.

Saturn has overtaken Jupiter as the planet with the most moons, according to US researchers. The moons were discovered using the Subaru telescope on Maunakea, Hawaii.

A royal palace in Nigeria has announced that its resident tortoise has died following a short illness, saying it was a remarkable 344 years old. The tortoise, named Alagba, meaning elderly one, lived in the palace of Ogbomoso in Oyo state.

For the best part of two centuries people's life expectancy has been improving at a pretty rapid and consistent rate. In the 1840s people did not live much past 40 on average.

Kadhimiya is the location of one of Shia Islam's most important pilgrimage sites. Millions of people come from all over the world to visit the mosque commemorating the martyrdom of the death, in the 8th Century, of Moussa al-Kadhim, the seventh of the 12 Shia imams. 

To play this video you need to enable JavaScript in your browser.When a Los Angeles police officer stopped to film a homeless woman singing operatically in a subway, little did they know that the video would go viral.Emily Zamourka is seen in the video singing Puccini's O Mio Babbino Caro.

Our World in Data (OWID) is a scientific online publication that focuses on large global problems such as poverty, disease, hunger, climate change, war, existential risks, and inequality.

Researchers have provided the first glimpse of what an ancient group of humans looked like. Denisovan remains were discovered in 2008 and human evolution experts have become fascinated with the group that went extinct around 50,000 years ago.

The BBC's weekly The Boss series profiles different business leaders from around the world. This week we speak to Andy Puddicombe and Richard Pierson, co-founders of meditation app Headspace. It was a series of tragedies that sent Andy Puddicombe's life onto a completely different path.

A vast "raft" of volcanic rocks stretching over 150 sq km (58 sq miles) is drifting through the Pacific Ocean, scientists say.The sea of pumice - the size of 20,000 football fields - was first reported by Australian sailors earlier this month.

The climate campaigner Greta Thunberg chose to sail to a UN climate conference in New York in a zero-emissions yacht rather than fly - to highlight the impact of aviation on the environment. The 16-year-old Swede has previously travelled to London and other European cities by train.

It's a German city dating back to the 9th Century, with 340,000 residents, a university, a medieval fort... but does it really exist? Bielefeld is now offering a €1m (£914,000) prize to anyone in Germany who can prove the city's non-existence.

The governor of the region says the dragons have become too tame. He has a clear vision of how the island should be transformed.   His argument for change has been bolstered by the recent interception of the first known Komodo smuggling ring - from the island of Flores.

The 5.1 magnitude earthquake had an epicentre about 22km (14 miles) north-west of Athens. Athenians ran out into the streets as the city shook for 15 seconds.

This is the Moon in 2050. As the rover rounds the imposing sides of a large crater, the astronauts catch the glint of mirrors mounted on its rim. The mirrors beam sunlight into the crater, powering a mining operation to extract water-ice within.

Satellite pictures confirm there is a persistent lava lake inside the crater of a remote British Overseas Territory (BOT) volcano. Few enduring lava lakes are known globally; the one at Mount Michael on Saunders Island in the South Atlantic may be only the sixth such example.

The Dalai Lama has apologised for controversial comments about the possibility of a woman succeeding him. Speaking to the BBC last month, the Tibetan spiritual leader said that any future female Dalai Lama should be "attractive".

An app that claimed to be able to digitally remove the clothes from pictures of women to create fake nudes has been taken offline by its creators. The $50 (£40) Deepnude app won attention and criticism because of an article by tech news site Motherboard.