European leaders will gather Monday to plot a rough path forward on defense. Wavering support from President Trump is likely to drive the debate.

In the Cretaceous period, a shark or another kind of fish found sea lilies less than digestible. What you might expect followed.

There were no Situation Room meetings and no quiet calls to de-escalate a dispute with an ally. Just threats, counterthreats, surrender and an indication of the president’s approach to Greenland and Panama.

The president’s confrontational foreign policy has created opportunity for his allies on K Street who are willing to take on clients he has targeted.

The once and soon-to-be president takes advantage of the blurry lines between appearance and perception, between reputation and reality.

Negotiations over an 836,000-square-mile island may fall to a close friend of Elon Musk with experience in deal-making. Just not that kind of deal-making.

In Paris, the two officials acknowledged potential strains on alliances with the return of Donald J. Trump to power, but said their countries would try to maintain strong ties.

The president-elect said the United States needed the island, which is a semiautonomous part of Denmark, for national security reasons. But there are other possible interests.

After Donald Trump suggested he might take over Greenland by force, the consensus among the island’s population appears to be bewilderment and anxiety.

In an hourlong news conference at his Florida club, Mar-a-Lago, the president-elect delivered a hodgepodge of grievances, complaints and false claims.

Global warming is making both places more important to global shipping and trade.

For many years, the 39th president generated little attention from authors. But recently books have sought to re-evaluate his reputation. Here is a look at the expanding Carter library.

Russia has assembled a fleet of hundreds of vessels to covertly ship its oil. With so many ships at sea, the idea of using some to cause havoc may be proving irresistible to the Kremlin.

In announcing his choice of various envoys, including ambassador to Denmark, the president-elect again floated the idea of the United States acquiring Greenland.

Mark Burnett and President-elect Donald J. Trump had a long and successful collaboration that made Mr. Trump a household name.

Cows and pigs produce a large share of planet-warming methane. A new tax is part of a plan to clean that up.

© Charlotte de la Fuente for The New York Times

Mette Lykke leads Too Good to Go, which operates in 19 countries to reduce waste and make surplus food accessible.

© Mark Kerrison, via Reuters Connect

The involvement of wealthy investors has made this presidential transition one of the most potentially conflict-ridden in modern history.

© Hiroko Masuike/The New York Times

The involvement of wealthy investors has made this presidential transition one of the most potentially conflict-ridden in modern history.

© Hiroko Masuike/The New York Times