Borepatch

This is a fascinating breakdown of the (quite serious) engineering problems facing SpaceX as they attempt to build a Mars city. 

Last year a company called Magellan sent a deep sea rover 15,000 feet down to the site of the final resting place of the battleship Bismark, sunk 86 years ago.  The video is simply spectacular.  Here is a shortish excerpt with commentary.
And since we're talking about the Bismark, this song is obligatory....

In this case, marine diesel engines which used to be famously long lived.  The Detroit Diesel engines of old were famous for running 20,000 or 30,000 hours before a four day rebuild at the dock set them up for another 20,000 or 30,000 hours.  You couldn...

And more importantly, which should you not trust?
This post is the fourth in a series on how to make your home network harder to attack.  Here are links to posts one, two, and three.
Now you might think the question in the post title is a bit strange - after all, these are you devices, so you'd think that they're all trustworthy.  You'd be wrong.  There are at a minimum two different categories of trustworthiness:...