The Earth's inner core spins more slowly. No one knows why.

Geophysicist John Vidale noticed something surprising while tracking how seismic waves move from the Earth's crust through its core. The…

Is the Seine River safe for Olympic swimming?

PARIS — Some laugh out loud, others raise their eyebrows or make faces. On the stone quays of the Seine,…

How Nancy Pelosi handled President Biden's withdrawal

Former House Speaker Nancy Pelosi, a Democratic powerhouse, took a careful and respectful stance in her public approach to President…