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Most of us might that the world's oldest colour is black or dark grey. However, scientists have out that bright pink is the oldest colour. Researchers looked at 1.1-billion-year-old rocks deep beneath the Sahara Desert. They the rocks into powder and found the bright pink colouring in them. This that pink is the oldest colour on geological record. Dr. Nur Gueneli from the Australia National University the research. She the discovery in a lab in Australia. Dr. Gueneli said the colour was by ancient organisms that lived in the oceans. She added that the oceans are so old they no longer . At that time, tiny organisms the largest life forms on Earth.

Dr. Gueneli her first reaction was "sheer amazement". She said her team the rock powder might black when they were their experiments on it. Instead, it turned pink. Another researcher said: "I I heard this screaming in the lab. Dr. Gueneli running into my office and said, 'look at this,' and she had this bright pink stuff…It out to be real colour, 1.1 billion years old." The rocks could other colours, from a blood red to a deep purple. Gueneli how important her find was. She said: "Imagine you could find a fossilized dinosaur skin that still has its original colour - green or blue. That is exactly the type of discovery that we've ."