Hard Numbers: The Packed Democratic Presidential Calendar

30 million: When police arrived at the home of Peru's former President Alan Garcia on Wednesday to arrest him on bribery charges, he killed himself. Brazilian construction firm Odebrecht, focal point of the enormous, multi-country Lava Jato corruption investigation, has admitted to paying $30 million of bribes in Peru since 2004. All of Peru's living ex-presidents are either in jail or under investigation for corruption.

20 billion: The EU this week threatened tariffs on $20 billion of US goods ranging from ornamental fish to exercise equipment as part of a long-running dispute over aerospace subsidies at the World Trade Organization. Washington recently listed $11 billion of European items that could be subject to new levies. Upcoming US-EU trade talks should be fun.

1,800: China granted permanent residency to just 1,800 foreigners in 2017, the latest year for which data is available, compared to about 1 million "green cards" given by the US to immigrants each year. Relative to its size, China is home to fewer foreigners than almost any other country in the world.

64: It may not take long for Democrats to find their 2020 presidential nominee. Under the current schedule, 64 percent of pledged delegates to the Democratic Party's national convention will be awarded in the first seven weeks of primary elections and caucuses, from February 3 to March 17, 2020. That percentage will increase if Colorado, Georgia, and New York—three large states that have not yet set a date for their votes—land during that period.

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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