Artículos sobre Evolution

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It’s OK, I’m a filter feeder: Whale shark off Indonesia. Marcel Ekkel/Flickr

Shark Week looms, but don’t panic

Media coverage of sharks often exaggerates risks to people, but more than 500 shark species have never been known to attack humans, and there's lots to learn about them.
The teeth in these Australopithecus africanus skulls contain important evidence about the nutrition of these individuals as they grew up. Luca Fiorenza

Teeth ‘time capsule’ reveals that 2 million years ago, early humans breastfed for up to 6 years

A new study shows the enigmatic hominin species Australopithecus africanus may have breastfed young for around 5-6 years – a very costly practice for the mother.
Artistic view of the evolution of elephants. From left to right, Moeritherium (30 million years old), Deinotherium (5 million years old) and a modern African elephant. Alex Bernardini (Simplex Paléo) and Sophie Vrard (Creaphi).

How did elephants evolve such a large brain? Climate change is part of the answer

A shift in climate, along with other environmental disruptions and the invasion of competitors and new predators all likely played an important role in reshaping ancient elephants' brains.
Jumping spiders, like this one, usually have eight eyes: two very large front eyes to get a clear, colour image and judge distance, and extra side eyes to detect when something is moving. Flickr/Thomas Shahan

Curious Kids: why do spiders need so many eyes but we only need two?

Human eyes are very complex and are good at doing many jobs at once, while spiders have different sorts of eyes that do different jobs.
Some lizards such as geckos can self-amputate their tails when threatened - these limbs can keep twitching for up to 30 minutes, creating a distraction and allowing the lizard to escape. Shutterstock

The extreme tactic of self-amputation means survival in the animal kingdom

Why do some animals amputate their own limbs? Turns out, there's a whole bunch of reasons why this strategy has evolved.

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