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The Times's Science section is introducing new columns, projects and more as part of its online relaunch.

The New York Times is soliciting readers' questions about the dangers -- and benefits -- posed by artificial intelligence.

Traditionally found in warm climates, like the American Southwest, armadillos have been migrating farther and farther north, researchers say.

Federal projects are rolling out A.I. agents that offer therapy and prescribe medicine, raising concerns about safety and the influence of venture capital investors.

Current chatbots aren't likely to help lone actors invent a deadly pathogen, experts say. But newer models, trained in biology, may need stronger safeguards.

As global temperature increase shoots past 1.5 degrees Celsius, the vulnerable countries that fought for that Paris Agreement target face a brutal new reality.

City officials -- and one determined mother -- are working to stop the spread of cychlorphine, which is far more potent than fentanyl.

Scientists simulated what happens when the pipes and tunnels that divert rainwater fail. In one scenario, 30 percent of local residents couldn't reach an E.R.

A researcher surveying a San Mateo County creek stumbled upon a preserved Pacific mastodon molar estimated to be at least 10,000 years old.

Birds are drawn to lights, and more than a billion die each year after crashing into buildings, experts said.