Early risers across North America and Europe may spot a bright, silent light gliding across the Christmas sky — and it just happens to coincide with an ISS flyby.

Couples who spend money on time-saving services — like getting takeout, hiring a housecleaner or calling a dog walker — report greater relationship satisfaction, especially during stressful periods, says Ashley Whillans, a behavioral scientist and professor at Harvard Business School. Whillans studies the “tradeoffs people make between time and money.” Not everyone can afford to outsource bigger household chores.

() -The European Centre for Disease Prevention and Control on Thursday urged people eligible ​for influenza shots to get vaccinated without delay, ‌warning that flu cases are rising weeks ahead of the last two seasons. Influenza ‌detections are rising three to four weeks ahead of the usual schedule in European Union and European Economic Area countries driven by a newly emerged strain, the ECDC said.