The New York Times

Driven by a growing environmental movement and mounting pressure from Western consumers, corporate and government leaders are making a new push to slow the cutting of rain forests.

Aspidoscelis neavesi was produced in the lab by mating two other species, and its creation defies conventional ideas about how new species evolve. Aspidoscelis neavesi was produced in the lab by mating two other species, and its creation defies conventional ideas about how new species evolve.

Every disease has a history. Some of that history is written in books, and some is written in our DNA.

Just after Christmas of 1938, a young woman named Marguerite Perey — then 29, with a plain, open face, her eyes intent upon her work — sat at a bench in the Radium Institute of Paris, a brick mansion near the Jardin du Luxembourg. In a glass vessel, she examined fluid containing metal salts. She…

Alexander Grothendieck, who died on Nov. 13 at the age of 86, was a visionary who captivated the collective psyche of his peers like no one else. To say he was the No. 1 mathematician of the second half of the 20th century cannot begin to do justice to him or his body of work.…

Weapons that rely on artificial intelligence to decide what to target could become increasingly difficult to control, critics warn.

Research on the brain is surging. The United States and the European Union have launched new programs to better understand the brain. Scientists are mapping parts of mouse, fly and human brains at different levels of magnification. Technology for recording brain activity has been improving at a revolutionary pace. Yet the growing body of data…

There is no “I” in team, we are told. It’s important for workers to share information and collaborate. So why would employees deliberately hide knowledge from their colleagues? And yet they do, all the time.

It has been nearly 20 years since a landmark education study found that by age 3, children from low-income families have heard 30 million fewer words than more affluent children, putting them at an educational disadvantage before they even began school. The findings led to increased calls for publicly funded prekindergarten programs and dozens of…