Terms apply to American Express benefits and offers. Visit americanexpress.com to learn more. All payment methods involve some degree of risk, whether from human error, financial fraud or identity ...

Scientific method is a body of techniques for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge. It is based on gathering observable, empirical and ...

Move over karyotypes—genetic disorder detection has vastly improved. Researchers are now using array CGH (aCGH), to quickly scan through an entire genome for imbalances. Because aCGH facilitates ...

National security, unlocked. Each Thursday, host Mary Louise Kelly and a team of NPR correspondents discuss the biggest national security news of the week. With decades of reporting from battlefields ...