On a battered rock in an ancient Martian riverbed, a pattern of dark, rounded patches has jolted planetary science. These ...

Machine learning is quietly rewriting the rules of the cosmic hunt for company. Instead of waiting to recognize familiar ...

Current and former Marine recruiters describe immense pressure to find enlistees. Amid the desperation, a culture of fraud ...

The key idea behind our framework is that life produces molecules with purpose, while nonliving chemistry does not. Cells ...