Real vs. Artificial Christmas Trees: Which Is the Greener Choice? (Published 2018)

Here’s a look at the central claims — and the common misconceptions — in that debate.

London A.I. Lab Claims Breakthrough That Could Accelerate Drug Discovery

Researchers at DeepMind say they have solved “the protein folding problem,” a task that has bedeviled scientists for more than 50 years.

Food Delivery Apps Are Booming. Their Workers Are Often Struggling.

Delivery drivers have been essential to feeding New York, while boosting sales for companies like DoorDash and Uber. But they say work conditions have gotten worse.

Bitcoin Hits New Record, This Time With Less Talk of a Bubble

The crazy cousin of traditional currencies, which fell below $4,000 in March, passed $19,783. More investors now are buying it for the long term.

Opinion | 1918 Germany Has a Warning for America

Donald Trump’s “Stop the Steal” campaign recalls one of the most disastrous political lies of the 20th century.

The Beat at the Heart of ‘Lovers Rock’

Steve McQueen’s new “Small Axe” anthology includes a film that centers on an offshoot of reggae that represented big shifts in the music, and in Black British culture.

Teaching in the Pandemic: ‘This Is Not Sustainable’

Teacher burnout could erode instructional quality, stymie working parents and hinder the reopening of the economy.

Australia Condemns Lurid Tweet by Chinese Official as ‘Disgusting Slur’

The post, with a doctored photograph showing an Australian soldier with a knife to the throat of an Afghan child, sent relations between the two countries to a new low.

France Thought It Could Reverse Globalization, but It’s Still Bleeding Jobs

The government is encouraging more factories, but C.E.O.s say labor costs in the country remain high.

As Iran Mourns Nuclear Scientist, Officials Vow to Find His Killers

“We chase the criminals to the end,” the Iranian defense minister said at the funeral of Mohsen Fakhrizadeh.

G.M. Scales Back Alliance With Electric Truck Start-Up Nikola

A new agreement, supplying hydrogen fuel cell technology from General Motors, is less sweeping than the strategic partnership outlined in September.

‘Because She’s a Girl’: Lockdown Exposes Gender Gap in U.K. Sports

Inequalities are especially pronounced in English youth soccer, where only a handful of clubs have kept training open for future female professionals, while boys at the same level play on.

Supreme Court Takes Up Trump Plan to Exclude Unauthorized Immigrants in Redistricting

The administration’s efforts, which are subject to practical hurdles, would upset a constitutional consensus and could shift political power from Democratic states to Republican ones.

4 Officers in France Are Charged Over Beating of a Black Man

The violence against Michel Zecler, a 41-year old music producer, caused a national outcry and fueled longstanding accusations of police brutality and racism.

On TikTok, Fans Are Making Their Own ‘Ratatouille’ Musical

Thousands of TikTok users, including musical theater professionals, are creating a Broadway-style adaptation of the animated Disney film about a rat with culinary aspirations.

Ransomware Attack Closes Baltimore County Public Schools

The attack, first discovered late Tuesday, disrupted the district’s websites and remote learning programs, as well as its grading and email systems, officials said.

When and How You’ll Get a Vaccine

Multiple inoculations for the coronavirus are making their way through the approval process. Here’s what we know about the plan for their distribution.

The King of Trump TV Thinks You’re Dumb Enough to Buy It

Chris Ruddy, the C.E.O. of Newsmax, has found a business opportunity in feeding Trump supporters the fantasy that the president could still win the election.

Moderna Applies for Emergency F.D.A. Approval for Its Coronavirus Vaccine

The first shots could be given as early as Dec. 21, if authorization is granted.

Nike and Coca-Cola Lobby Against Xinjiang Forced Labor Bill

Business groups and major companies like Apple have been pressing Congress to alter legislation cracking down on imports of goods made with forced labor from persecuted Muslim minorities in China.