New Year, New Creatures Of The Deep 🌊

THE MATRIX 1999, dir. The Wachowskis

via NASA Goddard Space Flight Center

We have three colored segment in this animation. Surprisingly the length of the longest one is always the sum of the length of the two smaller ones.

This is actually a very special case of Ptolemy’s theorem. The theorem gives a connection between the sides and the diagonals of a cyclic quadrilateral. In this case the length of the dashed lines is equal so the theorem can be simplified to the statement above. 

Ghost in the Shell (1995)

Will We Ever Have CYBORG BRAINS?

As you know... the term 'cyborg' is a portmanteau, combining the words 'cybernetic' and 'organism' and a cyborg is an entity comprising both organic and biomechatronic body parts.

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There's a slightly different version of this... If you want to see it, here it is.

Vessel sound is temporarily causing hearing loss in squids

Globally, anthropogenic sounds have become louder and more persistent, however, little is known about how invertebrates detect and respond to human-made sound. Now, new research shown noise associated with boats causes  causes temporal hearing loss in squids across different stages of their life cycle.

The hummingbird bobtail squid (Euprymna berryi) has a short lifespan of at least 6 months, which make them a convenient animal for lab studies. Hearing and behavioural observations were made by researchers before, during and after 15 minutes of vessel sound playback, to test how these squids react to noise pollution, and noted that these squids decrease their hearing sensitivity after exposure to noise, and particularly noise affected juveniles. Juvenile squids experienced an important hearing loss sensitivity after noise exposure between 400 and 800 Hz, while adult and mature squids decreased their sensibility after 200 to 600 Hz exposure, showing more resistence. All squids recovered auditory sensitivity within two hours.

Researchers aim the inclusion of cephalopods within management and policy, because anthropogenic activities and associated sound levels in the ocean are increasing, while the role sound plays in cephalopod life history is only just beginning to be understood.

Photo by Pascal Girard

Reference ()  Putland et al. 2023. Vessel sound causes hearing loss for hummingbird bobtail squid (Euprymna berryi). Frontiers in Marine Science 

My frozen land

🕷️Kenva🕷️

Grumpy Cusk Eel

NOAA Ocean Explorer on flickr