The endowment effect is the tendency to value something more once you own it. People usually demand much more money to give up an object than they would pay to acquire the same object. In experiments, participants given a pen or a coffee mug were generally unwilling to trade it for an item of similar value. The effect appears even when ownership is brief, or when the item was assigned at random. Economists explain it through loss aversion, the idea from prospect theory that losses weigh more heavily than equivalent gains. Giving something up feels like a loss, while acquiring it feels like a gain. The concept was popularised by the economist Richard Thaler, and it challenges the textbook assumption that people value goods the same whether they own them or not.

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.