The city is suing oil companies over global warming. Trump says lawsuits like these threaten national security. The judge wants to hear what both sides think.
The judges ruled that German civil law could be used to hold companies accountable for the worldwide effects of their emissions.
The judge said a customs officer had acted improperly in stripping Kseniia Petrova, a researcher at Harvard Medical School, of her visa after she failed to declare research samples she was carrying into the country.
Scientists found a way to get 30 kitties to cooperate with a study exploring the power of the feline scent of smell.