At the Montalegre circuit in Portugal, a 'Battle of Technologies' is underway, where electric vehicles and combustion engine cars race against each other over five laps of the rallycross track.

To demonstrate the format, I was taken out for a hot lap in one of the electric cars. But while the EV has more power and faster acceleration, compared to the internal combustion engine (ICE) vehicles, it's also heavier. And at around 1000 metres above sea level, the thin air will impact the ICE engines, making for interesting racing as the different technologies go head to head.

Scientists already knew that bluestreak cleaner wrasse (Labroides dimidiatus) are remarkably bright. These finger-sized coral reef fish are the first fish to pass the mirror test, a common assessment in which an animal recognises its reflection. Researchers have now found that these wrasses use their likeness to construct a mental image of their body size, which they can compare to others.

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