More than two dozen states and cities are suing over a controversial new citizenship question.

An unprecedented onslaught from the US hasn't destroyed the terrorist organization. What is the secret of its resilience?

Everybody has a personal internal clock in their brain that dictates when we feel like eating, waking and sleeping. But what happens when our life doesn't match our body clock? And how do we read it?

A simple act of kindness between George Bush and Michelle Obama illuminates our need for friendship and well-being.

2018 brought the announcement of a new geologic age that covers the last 4,200 years. How do scientists divide up Earth's timeline and what do these demarcations mean?

A new study suggests perceptions of how strongly people of color identify with their race can have a big impact on their job prospects and how much money they earn.

Even indirect exposure to the terrorist attacks of September 11 has left profound and deep impact on those too young to remember a world before that.

Tragedies involving building collapses prompt structural engineers to figure out what happened, and how to prevent it from recurring.

What we and other responders learned that day would go on to spark major changes in U.S. emergency response efforts.

Confrontation between French and British scallop fishers goes is a warning about the resource conflicts of the future.

Multitasking may not be what you think it is and it might not even help you be more productive if you choose to do the wrong things at the same time.

The build-up of foreign armed forces does not bode well for the citizens of Niger.