Hard Numbers: Notre Dame’s stones gleam after cleaning, Trump threatens yuge tariffs, Iceland gets new gov, Vaccine promises AIDS end

42,000: Workers restoring Paris’ Notre Dame Cathedral after the fire that ravaged it five years ago had to clean 42,000 square meters of stone. They used special techniques to minimize damage to the original masonry in the process and the results are stunning: See it for yourself: The medieval cathedral reopens to the public on Dec. 8.

100: President-elect Donald Trump on Saturday threatened to impose 100% tariffs on goods imported from BRICS countries (Brazil, Russia, India, China, and South Africa, as well Iran, Egypt, Ethiopia, and the UAE), should the organization try to issue its own currency or displace the dollar’s place in world trade. It’s an odd threat, as some members – namely Russia and Iran – are already so heavily sanctioned that trade with the US is non-existent, while others – Brazil, Egypt, and the UAE – are major US allies.

15: Iceland’s Social Democrats gained 15 seats in the Althing – one of the world’s oldest parliaments – and will unseat the ruling conservatives after seven years of power following Saturday’s snap election. It’s yet another example of the anti-establishment trend few democracies seem able to escape in this election-studded year.

2: A twice-yearly vaccine against HIV/AIDS has proven 100% effective against contracting the virus, which a UN report for World AIDS Day on Sunday called a “historic crossroads” in the fight to end the epidemic. Generic versions of the drug will be available in 120 low-income countries, mostly in Africa and Asia, but the manufacturer has not approved generic patents for Latin America, which may represent a crucial weak spot in distribution.