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Artículos sobre Evolution

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New claims for the existence of Bigfoot appear to have been greatly exaggerated. JD Hancock

The bigger the Bigfoot claim, the bigger the need for evidence

Forget blurry pictures and casts of big foot-prints. A Texas veterinarian, Dr Melba Ketchum, and her collaborators have published an article, in a peer-reviewed scientific journal, proving the existence…

Meet your ancestor, the shrew

Placental mammals like elephants, bats and humans evolved from small, insect-eating mammals, a study led by Stony Brook University…
The new study suggests extinction driven by climate instability may be just as important as evolution as a driver of plant biodiversity. http://www.flickr.com/photos/ecologyweb

Ice Age flora extinction reveals fresh plant biodiversity clues

Ice Ages caused a mass extinction of plants in south-eastern Australia around a million years ago, according to a new study that presents a fresh take on how extinction shapes biodiversity. Scientists…
It may be some time before we hear the pitter-patter of Neandertal feet. flequi

Women sought for Neandertal surrogacy? Not Yeti, thankfully

In a sort-of Ice Age version of Jurassic Park, Harvard University’s Professor George Church has suggested – to much media coverage – that, one day soon, scientists somewhere will place a very unusual personal…
Sponges and hydra, which are made of colonies of cells with a small number of cell types, have some similarities with cancer. Biodiversity Heritage Library

An astrobiological view of cancer’s evolutionary origin

Life originated on Earth about four billion years ago. Death, sex and multicellularity came along about a billion years later. According to our new atavistic model, cancer came with multicellularity. About…
In order to drag themselves onto land, fish-like creatures needed limbs. Thierrry

They came from the sea: the gene behind limb evolution

In the late Devonian period, roughly 365 million years ago, fish-like creatures started venturing from shallow waters onto land. Among the various adaptations associated with the switch to land life was…
We recognise extreme emotions, but may need more than facial expressions to decode them. How Hwee young/EPA

Are you furious? Body cues tell us more than faces

As social creatures, non-verbal communication through facial expression is important in portraying emotions – and because of this, it’s interpreted rapidly and accurately. Regardless of culture, defined…
The ears on Copiphora gorgonensis, a neotropical katydid from the National Natural Park Gorgona Island, Colombia, work in a similar way to human ears. Image courtesy of Daniel Robert & Fernando Montealegre-Z

Sound familiar? The insect ear that works like your own

The ears on a South American rainforest katydid’s legs work nearly the same way human ears do, a new study has found, showing that animal groups as apparently unrelated as mammals and insects have evolved…
Ants might be a pain … but they play a vital role in maintaining the variety of plant life we see around us. mraandrews

In defence of the humble ant, champion of biodiversity

You’d be hard pressed to find many people who hold ants in high regard. That might be due to their destructive behaviour towards lawns, their ability to infest your house in no time at all, or a willingness…
Opsin genes, one of the building blocks of vision, first emerged roughly 700 million years ago. ~Dezz~

Eye to the past: vision may be older than previously thought

The eye is perhaps one of the best examples of Darwinian evolution. Incremental steps driven by natural selection have led to the evolution of this complex organ from its origin as a simple light-sensitive…

Why monkeys are fascinated with violence

Monkeys who observe fights tend to exploit the losers for grooming favours. This may provide an evolutionary context for…

Insects drive rapid plant evolution

Evolutionary change is occurring rapidly around us, every day, as insects impose natural selection pressures on plants. Using…
It’s easy for uninhibited humans to elicit vocal responses from gibbons by imitating their song. Jerome Ludmann

Gibbon song may be music to the ears of human language students

Gibbons and humans have more in common than might immediately seem apparent. Among many behavioural traits shared by our two species is singing. Not just that – the songs of gibbons have the potential…
It might be cute, but when it grows up it might also like to eat you. Steve Hillebrand/Wikimedia Commons

Think humans are special? Like the animals we eat, we’re meat too

In recent advertisements for Meat and Livestock Australia, actor Sam Neill told us, in David Attenborough-inflected tones, that: “when our early ancestors started to eat red meat, our brains began to grow…

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