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1. Who's behind viral online posts fuelling a crisis over migration in Europe?

   

   Viral social media posts and misinformation helped mobilize thousands of migrants toward Spain's Ceuta enclave, highlighting how online networks can exploit desperation — even as experts warn social media did not create the desire to migrate.

2. Ebola in the Democratic Republic of Congo: What's going on and why is the outbreak so alarming?

   

   The Ebola outbreak in the Democratic Republic of Congo is spreading at an "unprecedented speed," according to the World Health Organization. Experts say armed conflict and a lack of vaccines or treatment are among several factors complicating response efforts.

3. Nick Kyrgios provisionally suspended from tennis after testing positive for cocaine

   

   Former Wimbledon finalist Nick Kyrgios revealed on Wednesday he tested positive for cocaine and was provisionally suspended from tennis.

4. New research discovers the twisty secret behind the narwhal's unusually straight tusk

   

   The study, published in the journal Nature Communications, explains how it's actually two opposing spirals that counteract each other and allow the tusk to grow straight.

5. Trump pauses 50 per cent tariffs on Canadian goods for 3 days

   

   U.S. President Donald Trump has announced he will pause the implementation of 50 per cent tariffs on a range of Canadian goods for three days, posting the decision less than two hours before the crushing levies were set to take effect.