Mysterious undersea “crop circles” finally explained

Mysterious undersea circles spotted off the coast of Denmark are not the work of aliens or spiders. Or alien spiders, unfortunately. Rather, the rings are the result of poisonous sulphides tucked into the mud coating the seafloor.

Photos of the underwater rings first surfaced in 2008. Since then, people have compared the mysterious things to crop circles or fairy rings—those enchanting little fungal designs that can sometimes spring up on your lawn. But nobody knew what the aquatic rings were, or why they were there. Some of them measured nearly 15 meters (or nearly 50 feet) across—were they World War II-era bomb craters?

In 2011, scientists determined that the rings themselves were made of eelgrass, a native type of seagrass that hosts small fish and other crustaceans. Late last year, after studying the circles, the same team found that an interaction between the eelgrasses and seafloor sulphides sculpts the mysterious shapes.

Read 4 remaining paragraphs | Comments

    



via Ars Technica http://ift.tt/Lmg4IS

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s