People who drink coffee regularly seem to have different digestive physiology, not just different gut bacteria. University of Copenhagen researchers had volunteers swallow an electronic capsule that recorded transit time, temperature, acidity and intestinal contractions as it passed through. Frequent coffee drinkers, defined as one to five cups on most study days, had a more diverse set of gut microbes, a lower pH (more acidic) in the small intestine and more contractions in the colon. Contractions help move food along and may help prevent constipation, but researchers can't yet say whether the lower acidity is good or bad. The study can't prove coffee alone caused the differences.

Israeli reports also say the cabinet directed the military to prepare for a possible new attack on Iran.

Angkor, near Siem Reap in northern Cambodia, was the capital of the Khmer Empire, which ruled much of mainland Southeast Asia between roughly the 9th and 15th centuries. At its height the city spread across about 3,000 square kilometres, making it the largest pre-industrial city on Earth by area. Its growth depended on water: huge reservoirs called barays, along with canals and embankments, stored monsoon rain and carried it to rice fields. That system let farmers harvest more than once a year and fed a very large population through the dry season. The temple complex of Angkor Wat, built in the early 12th century, is the best-known monument and still stands at the heart of the park.