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42Evolution

Here and Now

All in the head; what gives us our oddly-shaped brain?

A selection of animals with very different brains. Clockwise from top left; Barn own (Tyto alba), a human (Homo sapiens), a Commissarisi’s Long tongued bat (Glossophaga commissarisi), and a red squirrel (Scirius vulgaris). (All images: Wikimedia commons)

A selection of animals with very different brains. Clockwise from top left; Barn own (Tyto alba), a human (Homo sapiens), a Commissarisi’s Long tongued bat (Glossophaga commissarisi), and a red squirrel (Scirius vulgaris). (All images: Wikimedia commons)

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A dolphin mother calls to her calf using its unique signature whistle and teaches it to hunt. Male dolphins call each other’s whistle signatures when hunting. When meeting a new pod, dolphins call using their own signature whistles, as though announcing who is there. Whilst most mammals identify each other by scent, dolphins hold their breath when diving, so cannot use this sense. Instead these animals use signature calls (‘names’) to stay in contact with each other in low visibility conditions, and to strengthen social bonds between parents and offspring (Image: Wikimedia Commons)

Putting things into words

The dolphin calf is barely three weeks old.  His mother nuzzles at him, calling softly.  The calf responds, mimicking her…

Der Liebeskranke Antiochus by Johann Anwander (1715-1770), portraying the lovesick king Antiochus; ruler of the Seleucid empire (now modern Syria) from 281-261 BC. In his novel Love in the time of Cholera author Gabriel Garcia Marquez explores the notion that lovesickness is literally an illness whose effects on the body are comparable to those of cholera. The word ‘choleric’ in English means depressed, irritable and angry, and in Marquez’ native Spanish, cólera can also denote passion, rage and ire. The metaphor illustrates the power our emotions have to affect our physical body and mental processes (Image: Wikimedia Commons)

Love in a time of Prozac; how did our emotions evolve?

Our feelings result a fast information processing mechanism found throughout the vertebrates, and which are highly developed in mammals. What then is ‘love’, really, and how did it evolve?

Film poster of the 1957 sci-fi comedy 'Invasion of the Saucer-Men' (Image: Wikimedia Commons)

Could your brain be five times bigger?

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