Enormous numbers of marine and land-based plants and animals died, ecosystems collapsed and oceans acidified. What has been less clear, however, is why it got so hot and why “super greenhouse” ...

In dark clouds, we try to move away. Everything is turning against that kiss of hope. Hamas has really found a way to use ...

About 200 students at Cheltenham High School on the outskirts of Philadelphia, about 14 percent of the school’s enrollment, ...