Ants on stilts

In addition to using the position of the sun as compass to find their way home, ants also use an inbuilt pedometer that tracks how many steps they have taken. To show that this step-tracking mechanism is important to ants’ sense of direction, researchers changed the sizes of the steps by either tying them to…

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Viking cats

The origin and spread of these adorably nasty little creatures are still not well understood. A recent study has sequenced DNA from more than 200 cats that lived between 200 to 15,000 years ago, from more than 30 archaeological sites across Europe, the Middle East and Africa. The researchers found that the cat population appear…

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Gender-altering fish

Some species of fish, such as clownfish, gropers and eels, are able to change their gender. For instance, all blue gropers are born as females (and they are brown to reddish-brown). Each area typically only has one or two male blue gropers, and if the dominant male blue groper dies, the largest female would change…

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