Whether or not you have watched (or agree with) the movies Free Willy or Blackfish, the predicament of captive cetaceans is one that can spark off a heated debate from both sides of the fence.

Nonetheless, such movies and increased awareness have led to public calls for attractions and venues that keep wild animals captive to release them.

Marine-animal attractions like SeaWorld are particularly under fire due to their animal shows featuring captive cetaceans trained to perform for public entertainment.

In a study involving 378 orcas (or killer whales), researchers observed the first non-human example of the "grandmother effect" in a menopausal species.

This is when post-reproductive grandmothers (in this case, orcas) assist other members of the species with their offspring, thereby improving the young ones’ chances of survival. It was found that these post-reproductive orcas had the largest beneficial impact on their grandoffspring’s survival chances.

The wreck of the German battlecruiser SMS Scharnhorst, sunk by the Royal Navy during the First World War with the loss of all her crew and Admiral Graf von Spee has been found in the South Atlantic. SMS Scharnhorst, the flagship of the East Asia Squadron which was once the scourge of the Royal Navy, went down with most of the rest of the formation on December 8, 1914, in the Battle of the Falkland Islands.

The battlecruiser sank on Dec. 8, 1914, with more than 800 crew members on board, including German Adm. Maximilian Graf von Spee.