High schoolers are appealing to other health-conscious kids online, sometimes by expressing views in line with the “Make America Healthy Again” movement.

Global wariness of Chinese solar and E.V. domination offers India an opening. The government is spending money to try to catch up, but it has a long way to go.

After eight years of weekly chats, one more for the road.

A new wave of “reasoning” systems from companies like OpenAI is producing incorrect information more often. Even the companies don’t know why.

The loss of the Great Salt Lake would be an environmental disaster with health and economic effects far beyond Utah’s borders. The state is taking action, but critics say it’s not doing enough.