Sustainable building EnviroBuild, a sustainable building materials company, pays $US 25,000 to name a newly discovered limbless amphibian "Dermophis donaldtrumpi", after U.S President Donald Trump, in disagreement with his environmental policy.
2017–18 Spanish constitutional crisis Carles Puigdemont calls on Jordi Sànchez and Jordi Turull to end the hunger strike they started on 1 December.
Nisour Square massacre In a third trial, former Blackwater private military contractor Nicholas Slatten is convicted on one count of first-degree murder over the 2007 mass shooting.
Ebola outbreak Over 300 people have died of Ebola in the Democratic Republic of Congo and the World Health Organization is concerned the outbreak is not being contained.
American intervention in Syria The Pentagon reports it has begun withdrawing U.S. troops from Syria, with a spokesperson saying that the coalition has liberated ISIL-held territory but also that the campaign is not over.