Humans and birds aren't the only creatures that sing. Whales sing too. In fact, the songs of humpback whales are some of the most complex arrangements in the animal kingdom. Their ditties consist of vast roars, deep bellows, and groans interspersed with interesting sighs, chirps, whistles, and squawks.Their songs range from five to 30 minutes long.

Once a whale is done singing, it will surface to take a breath, then descend to about 50 feet, where it holds its position with its head down and then repeats the song verbatim, again and again, sometimes for hours on end.

As far as we know, only the males sing, and humpbacks in the same region of the ocean sing the same song. Each year, their songs change somewhat, as though they are experimenting with different arrangements.

The song of the humpback reaches sound levels up to 180 decibels — that's louder than a rocket blasting off! And researchers believe that some of these low-frequency sounds can travel more than 3,000 miles!

Denver, Colorado is 5,276 feet above sea level, hence the nickname “Mile High City.” 

The altitude there has been credited and blamed for the effects it has on unaware or unprepared visitors from lower elevations. People feel the effects of lower air pressure and decreased oxygen when they arrive; the same goes for visiting athletes. 

Sure, they’re better conditioned than Joe or Jane Average, but they’re drawing more on the thin air in their competitive exertions. Many, if they’re honest, have stories to tell about needing rather quickly to find their second wind and taking a few days to acclimate enough that their performances don’t suffer.

Such teams as the Nuggets, Avalanche, Broncos, and Rockies actually employ marketing schemes to plant seeds doubt in visiting teams, amplifying the disadvantages posed to those athletes who are not properly altitude trained. For example, at Ball Arena, there is signage where visiting teams enter and exit noting the city’s altitude. The numbers 5,280 are printed right on the court, near each free-throw line. The video board during introductions welcomes the road team with an ominous warning about the difficulty in catching one’s breath. Then, there are large, hazard-orange-and-black placards on display (“Attention: Altitude Warning/Low Oxygen”).

In fact, the intimidating marketing is right there in the name ... "Empower Field" at "Mile High Stadium"!

In response, we often see oxygen tanks used on the visiting teams’ sidelines to help them try to catch their breath.

There is a whole school of athletic training based on high-altitude workouts. Olympic athletes routinely seek out facilities in Denver and Colorado Springs to boost their oxygen efficiency, and countless trainers and gyms simulate the effects with dedicated breathing equipment.

In a sermon delivered by the late, great Haddon Robinson, he spoke about the stain of sin and its remedy. While the exact text is not currently available, the following is inspired by various accounts of Robinson’s sermon entitled The Stain of Sin::

Consumer Reports magazine once published a booklet with an intriguing title: How to Clean Practically Anything. The book offered advice on which solvents work best for removing all kinds of stains. Since my clothes often get stained, I really appreciated that book.

Did you know that glycerin can remove ballpoint ink stains? Boiling water can take out berry stains. Parents with young children should keep a gallon of vinegar handy for crayon marks. Bleach works well on mildew. Lemon juice is effective for rust.

I haven’t tried all of these remedies myself, but I figure the experts tested them first.

What you won’t find in that book, however, is how to deal with the worst stains of all—the stains in your life caused by sin. These are the deep, ugly marks left by hostile words and shameful actions. Tears cannot wash them away. Determination cannot erase them. Sometimes we convince ourselves that as life goes on, our sins will simply fade away. Yet unexpectedly, those stains seep back into our lives.