Beyond Earth's atmosphere lurks a threat that could knock out our electrical grid and cause catastrophic structural, not to mention economic, damage. The risk within the next decade is about as great as that of another earthquake shaking California. So…

Containing this year's Ebola outbreak won't be easy. Undeveloped governments in the three countries most affected by the current Ebola surge -- Guinea, Liberia and Sierra Leone -- are having trouble coordinating a response, and health care workers are overwhelmed,…