Nepal | September 23, 2019

Mirror test hints at surprising cognitive abilities in fish


A fish called a cleaner wrasse interacts with its reflection in a mirror placed on the outside of the aquarium glass at a laboratory in Konstanz, Germany on February 6, 2019. Photo: Alex Jordan via Reuters

WASHINGTON: A small tropical reef fish was able to recognise itself in a mirror, scientists said on Thursday in a finding that raises provocative questions about assessing self-awareness and cognitive abilities in animals. The study involved experiments in which the fish species Labroides dimidiatus, called the bluestreak cleaner wrasse, was given a mirror self-recognition test, a technique developed in 1970 for gauging animal self-awareness.

Brick by Lego brick, teen builds his own prosthetic arm

David Aguilar has built himself a robotic prosthetic arm using Lego pieces after being born without a right forearm due to a rare genetic condition. Aguilar, 19, who studies bioengineering at the Universitat Internacional de Catalunya in Spain, is already using his fourth model of the colourful prosthetic and his dream is to design affordable robotic limbs for those who need them.


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