Scientists developed a model to predict the spread of pin-tailed whydahs, and found they could strain native bird species in California, Texas and elsewhere.
By JOANNA KLEIN
Palm cockatoos are the only animals observed to use tools for rhythmic drumming, seemingly to attract mates, prompting speculation about the rise of human music.
By STEPH YIN
Deer and elk are dying from chronic wasting disease in growing numbers. Burning the land may be the only way to turn back the disease.
By CARL ZIMMER
Historical observations of bright nights that were almost like daytime have a new explanation in forces of the upper atmosphere.
By JOANNA KLEIN
Angela Merkel Sets Collision Course With Trump Ahead of G-20
The German chancellor predicted “very difficult” talks with the United States on climate and trade at next week’s Group of 20 gathering in Hamburg.
By MELISSA EDDY
As Climate Changes, Southern States Will Suffer More Than Others
The most detailed economic study yet of global warming’s cost to the United States finds that the Southeast and Midwest will be hardest hit.
By BRAD PLUMER and NADJA POPOVICH
In Blow to ‘Clean Coal,’ Flawed Plant Will Burn Gas Instead
Southern Company built its plant in Mississippi to show how coal could be burned with fewer carbon emissions. But it never worked as designed.
By HENRY FOUNTAIN
E.P.A. Moves to Rescind Contested Water Pollution Regulation
Environmentalists strongly supported the rule, which was a key conservation initiative of the Obama administration. But landowners and developers have bitterly opposed it.
By CORAL DAVENPORT
Plague Is Found in New Mexico. Again.
Two people were found to have plague this week. What does the disease look like in the modern world, and why does it keep happening in New Mexico?
By LIAM STACK
HOW I GOT THE SHOT
To Photograph a Galápagos Tortoise, Get Out of the Race
Slow and steady, learns Federico Rios Escobar, isn’t just great advice for composing an image; it’s also an appealing state of mind.
By FEDERICO RIOS ESCOBAR
The Lab Says It’s Cancer. But Sometimes the Lab Is Wrong.
Thousands of patients may receive incorrect cancer diagnoses each year because of biopsy mix-ups. New technology can help prevent the mistakes — if pathologists adopt it.
By GINA KOLATA
The Solution for Skin Ailments Could Be Right Under Your Nose
While bacteria have long been associated with disorders like acne and eczema, scientists are now fighting back with friendly members of the skin’s microbiome.
By FERRIS JABR
TAKE A NUMBER
Nearly Half of Teens Have Had Sex by Age 19, Survey Finds
Sexual activity declined among adolescents in the 1990s, and rates have remained low. Still, teenagers in the United States are more likely to become pregnant than those in other western countries.
By NICHOLAS BAKALAR
A Matter of Considerable Gravity
All the planets in the solar system interact gravitationally with the sun, but Jupiter’s great mass makes this interaction visible.
By C. CLAIBORNE RAY