Serendipity Design overkill

Search engines

THE GENERAL view of evolution is that it results in a creature that is perfectly suited to its task, with every single trait contributing to its ability to thrive, survive and multiply. For example, rattlesnakes are so well adapted as predators that they can attack even when they are dead.

A pair of doctors in Arizona, Frank LoVecchio and Jeffrey Suchard, had read stories in local newspapers describing how rattlesnakes, after being shot or bludgeoned to death, had inflicted serious injuries. They decided to investigate the matter further, and followed up every case they could find during the course of a year.

The doctors discovered that 15 per cent of rattlesnake bites occurred after death. In one case, a person picked up a decapitated head, holding it at the back of the neck, so that the fangs pointed away, but the dead head twisted around and injected venom, causing the man eventually to lose a finger. In an even more extreme case of rattlesnake resurrection, a headless snake leapt to attack a person, its bloody neck hitting the target. If the head had still been in place, the fangs would have bitten, and the attack would have been successful.

All of this demonstrates the extent to which evolution has hard-wired the snake's attack mechanism, thereby circumventing the snake's brain and quickening the attack. The infra-red and touch sensors remain active for a short period after brain death, and continue to initiate well-aimed assaults.

The rattlesnake appears to demonstrate the efficiency of evolution. It seems to have developed a series of attributes which are all vital to its survival. Everything is exploited and there seems to be no room for redundancy. However, according to a recent article in New Scientist magazine, there is some evidence to suggest that snakes, and some other creatures, are over-designed. Xavier Bonnet, a French zoologist who was studying tiger snakes in western Australia, chanced upon a curious injury suffered by many of the snakes. The seagulls of the region had the habit of pecking out the eyes of tiger snakes, and consequently 10 per cent of them were blinded.

Bonnet studied these blinded snakes, and discovered that they were able to find mates and hunt just as well as sighted ones. They grew to the same length and weight as sighted snakes. This was important evidence in favour of a theory put forward by Carl Gans, a biologist at the University of Texas. Gans has been arguing that animals, having evolved a trait during one phase of their history, often retain that trait, even if it is no longer of any use millions of years later. In the case of the tiger snake, vision must have been useful in the past, but other senses have since taken over and yet the eyes have remained in place, even though they are of no benefit to the snake's survival.

Arts and Entertainment
Lena Headey as Cersei Lannister

TV reviewIt has taken seven episodes for Game of Thrones season five to hit its stride

Arts and Entertainment
Jesuthasan Antonythasan as Dheepan

FilmPalme d'Or goes to radical and astonishing film that turns conventional thinking about immigrants on its head

Have you tried new the Independent Digital Edition apps?
Arts and Entertainment

ebooksNow available in paperback
Arts and Entertainment

ebooks
Arts and Entertainment
Måns Zelmerlöw performing

Eurovision
Arts and Entertainment
Graham Norton was back in the commentating seat for Eurovision 2015

Eurovision
Arts and Entertainment
Richard Hammond, Jeremy Clarkson and James May on stage

TV
Arts and Entertainment
The light stuff: Britt Robertson and George Clooney in ‘Tomorrowland: a World Beyond’
film review
Arts and Entertainment
Reawakening: can Jon Hamm’s Don Draper find enlightenment in the final ‘Mad Men’?
tv reviewNot quite, but it's an enlightening finale for Don Draper spoiler alert
Arts and Entertainment
Breakfast Show’s Nick Grimshaw

Radio
Arts and Entertainment

Eurovision
Arts and Entertainment
'Youth' cast members Paul Dano, Jane Fonda, Harvey Keitel, Rachel Weisz, and Michael Caine pose for photographers at Cannes Film Festival
film
Arts and Entertainment
Adam West as Batman and Burt Ward and Robin in the 1960s Batman TV show

Comics
Arts and Entertainment
I am flute: Azeem Ward and his now-famous instrument
music
Arts and Entertainment
A glass act: Dr Chris van Tulleken (left) and twin Xand get set for their drinking challenge
TV review
Arts and Entertainment
MIA perform at Lovebox 2014 in London Fields, Hackney

music
Arts and Entertainment
Finnish punk band PKN hope to enter Eurovision 2015 and raise awareness for Down's Syndrome

eurovision
Arts and Entertainment
William Shakespeare on the cover of John Gerard's The Herball or Generall Historie of Plantes

books
Arts and Entertainment

Game of Thrones review
Arts and Entertainment
Grayson Perry dedicates his Essex home to Julie

Potter's attempt to create an Essex Taj Mahal was a lovely treat

tv
Arts and Entertainment
A scene from the original Swedish version of the sci-fi TV drama ‘Real Humans’
tv
Arts and Entertainment
Hugh Keays-Byrne plays Immortan Joe, the terrifying gang leader, in the new film
filmActor who played Toecutter returns - but as a different villain in reboot
Arts and Entertainment
Charlize Theron as Imperator Furiosa in Mad Max: Fury Road
film
Arts and Entertainment
Jessica Hynes in W1A
tvReview: Perhaps the creators of W1A should lay off the copy and paste function spoiler alert
Latest stories from i100
Have you tried new the Independent Digital Edition apps?

ES Rentals

    Independent Dating
    and  

    By clicking 'Search' you
    are agreeing to our
    Terms of Use.

    Blundering Tony Blair quits as Middle East peace envoy – only Israel will miss him

    Blundering Blair quits as Middle East peace envoy – only Israel will miss him

    For Arabs – and for Britons who lost their loved ones in his shambolic war in Iraq – his appointment was an insult, says Robert Fisk
    Fifa corruption arrests: All hail the Feds for riding to football's rescue

    Fifa corruption arrests

    All hail the Feds for riding to football's rescue, says Ian Herbert
    Isis in Syria: The Kurdish enclave still resisting the tyranny of President Assad and militant fighters

    The Kurdish enclave still resisting the tyranny of Assad and Isis

    In Syrian Kurdish cantons along the Turkish border, the progressive aims of the 2011 uprising are being enacted despite the war. Patrick Cockburn returns to Amuda
    How I survived Cambodia's Killing Fields: Acclaimed surgeon SreyRam Kuy celebrates her mother's determination to escape the US

    How I survived Cambodia's Killing Fields

    Acclaimed surgeon SreyRam Kuy celebrates her mother's determination to escape to the US
    Stephen Mangan interview: From posh buffoon to pregnant dad, the actor has quite a range

    How Stephen Mangan got his range

    Posh buffoon, hapless writer, pregnant dad - Mangan is certainly a versatile actor
    The ZX Spectrum has been crowd-funded back into play - with some 21st-century tweaks

    The ZX Spectrum is back

    The ZX Spectrum was the original - and for some players, still the best. David Crookes meets the fans who've kept the games' flames lit
    Grace of Monaco film panned: even the screenwriter pours scorn on biopic starring Nicole Kidman

    Even the screenwriter pours scorn on Grace of Monaco biopic

    The critics had a field day after last year's premiere, but the savaging goes on
    Menstrual Hygiene Day: The strange ideas people used to believe about periods

    Menstrual Hygiene Day: The strange ideas people once had about periods

    If one was missed, vomiting blood was seen as a viable alternative
    The best work perks: From free travel cards to making dreams come true (really)

    The quirks of work perks

    From free travel cards to making dreams come true (really)
    Is bridge the latest twee pastime to get hip?

    Is bridge becoming hip?

    The number of young players has trebled in the past year. Gillian Orr discovers if this old game has new tricks
    Long author-lists on research papers are threatening the academic work system

    The rise of 'hyperauthorship'

    Now that academic papers are written by thousands (yes, thousands) of contributors, it's getting hard to tell workers from shirkers
    The rise of Lego Clubs: How toys are helping children struggling with social interaction to build better relationships

    The rise of Lego Clubs

    How toys are helping children struggling with social interaction to build better relationships
    5 best running glasses

    On your marks: 5 best running glasses

    Whether you’re pounding pavements, parks or hill passes, keep your eyes protected in all weathers
    Joe Root: 'Ben Stokes gives everything – he’s rubbing off on us all'

    'Ben Stokes gives everything – he’s rubbing off on us all'

    Joe Root says the England dressing room is a happy place again – and Stokes is the catalyst
    Raif Badawi: Wife pleads for fresh EU help as Saudi blogger's health worsens

    Please save my husband

    As the health of blogger Raif Badawi worsens in prison, his wife urges EU governments to put pressure on the Saudi Arabian royal family to allow her husband to join his family in Canada