CIA and UFOs

The CIA has released a batch of previously classified documents related to UFO investigations.

In most of the cases covered, the sightings were explained, but some cases remain mysterious.

Perspective

Amazon, which was founded by Jeff Bezos, missed estimates last quarter, but still had revenues of almost $36 billion.

That's nearly twice NASA's annual budget.

Challenger

Thirty years ago, space shuttle Challenger exploded shortly after launch, killing all seven astronauts onboard.

It was the first loss of life during a mission in U. S. space history, which was actually a remarkable record.

Opportunity

NASA's rover Opportunity has now been exploring Mars for a full 12 years, and it's still moving right along.

Opportunity's mission was supposed to last 90 days.

New Life Theory

A new hypothesis from two scientists holds that life might be rare in the universe not because it's unlikely life will arise, but because planetary conditions are rarely stable long enough for life to flourish.

Testing that hypothesis, of course, will likely be the work of ages.

Young Surface

Based on a lack of craters, a researcher calculates part of the surface of Pluto may be only 10 million years old, or even younger.

The geologically active Pluto revealed by New Horizons has surprised some scientists.

Bezos Two For Two

Billionaire Jeff Bezos' Blue Origin spaceflight company has successfully launched and soft landed the very same booster it launched and softly landed last November-- a big step towards routine reuseability.

BO plans to repeat the feat with the same booster several times this year.