Experts are tracking asteroid 2024 YR4, which has a 1.2% chance of impacting Earth in 2032. Observations continue to refine ...

Even though humans have pondered the moon since the first of us looked skyward, there is still much we don't know about it.

Oscar Murdock, my sainted father, does not wear his heart on his sleeve. At age 92, he is beyond such sentimentality. Instead, every day, he affixes a ...