Hard Numbers: Indonesia’s bulging youth population

430,000: Japan's population is shrinking by the equivalent of a medium-sized city each year due to a rapidly declining birth rate. The native-born Japanese population fell by 430,000 in 2018, while 161,000 migrants entered the country, partially offsetting that loss.

67: Prices of staple foods in Iran have soared this year – with the price of beef up 67 percent, fruit up 58 percent, and rice up 24 percent – as US sanctions have sunk the Iranian economy. Police in Tehran arrested 43 people accused of manipulating Iran's meat market over the Persian New Year holidays in early April.

51: Just over half of Russians in a recent poll – 51 percent – expressed admiration, sympathy, or respect for Josef Stalin, the highest reading since pollsters began tracking public attitudes towards the former Soviet dictator in 2001. Seventy percent of respondents said Stalin's three-decade reign had been "positive" for the country.

42: Of the 270 million people living in Indonesia, the world's largest Muslim majority country, around 42 percent, or 113 million, are under the age of 25. Educating, training, and finding jobs for the country's growing youth population will be a key challenge for the next president.

4: Measles cases reported around the world have quadrupled over the past year to more than 112,000, according to the World Health Organization. Africa has been worst-hit, with cases of the dangerous respiratory illness up eight-fold across the continent. Cases are also rising in the US, Thailand, and other countries with traditionally high levels of vaccination – a trend that a WHO official attributed to online anti-vaccine conspiracy theories.

Scientists, engineers and technologists are turning to nature in search of solutions to climate change. Biomimicry is now being applied in the energy sector, medicine, architecture, communications, transport and agriculture in a bid to make human life on this planet more sustainable and limit the impacts of global warming. New inventions have been inspired by humpback whales, kingfishers and mosquitoes.

Learn more at Eniday: Energy Is A Good Story

The drumbeat for regulating artificial intelligence (AI) is growing louder. Earlier this week, Sundar Pichai, the CEO of Google's parent company, Alphabet, became the latest high-profile Silicon Valley figure to call for governments to put guardrails around technologies that use huge amounts of (sometimes personal) data to teach computers how to identify faces, make decisions about mortgage applications, and myriad other tasks that previously relied on human brainpower.

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January 27 marks 75 years since the liberation of Auschwitz-Birkenau, the largest Nazi extermination camp. But even as some 40 heads of state gathered in Jerusalem this week to commemorate the six million Jews who were killed, a recent Pew survey revealed that many American adults don't know basic facts about the ethnic cleansing of Europe's Jews during the Second World War. Fewer than half of those polled knew how many Jews were killed in the Holocaust, and close to a third didn't know when it actually happened. Here's a look at some of the numbers.

1: The Greek parliament has elected a woman president for the first time since the country's independence some 200 years ago. A political outsider, Katerina Sakellaropoulou is a high court judge with no known party affiliation. "Our country enters the third decade of the 21st century with more optimism," Greece's prime minister said.

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A quarantine in China– Local authorities have locked down the city of Wuhan, the source of the outbreak of a new and potentially deadly respiratory virus that, as of Thursday morning, had infected more than 540 people in at least six countries. Other nearby cities were also hit by travel restrictions. Rail and air traffic out of Wuhan has been halted. Public transportation is shut, and local officials are urging everyone to stay put unless they have a special need to travel. Wuhan is a city of 11 million people, many of whom were about to travel for the Chinese New Year. We're watching to see whether these extraordinary measures help stem the outbreak, but also to see how the people affected respond to the clampdown.

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