from harmful content. the entrepreneur struck a deal to buy the social media giant for $41; billion. he has vowed to relax content restrictions, which has worried some human rights groups. poland could drastically cut back on flights to and from warsaw from may first, if a dispute with air traffic controllers over pay and working conditions is not resolved. almost 90% of air traffic controllers in warsaw chose to quit rather than accept new working regulations, which they say threaten safety. this will leave warsaw s two main airports with only 26 controllers between them. thousands ofjellyfish have invaded the coast around the italian port city of trieste. scientists say the exceptional phenomenon is caused by strong winds pushing the jellyfish towards the shore. they say it s also a sign of global warming with the warmer seas helping the jellyfish population boom.