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Micro-optics are optical systems that are between a few micrometres and a millimetre in size. This includes small lenses or arrays of lenses, or optical fibres with a microscale core diameter. Such ...

During scalp micropigmentation, a provider uses a thin needle to deposit tiny dots of color on the scalp. The dots vary in size and depth, creating the appearance of thicker hair. Scalp ...

I review privacy tools like hardware security keys, password managers, private messaging apps, and ad-blocking software. I also report on online scams and offer advice to families and individuals ...

The discovery of catalytic RNA transformed our understanding of life's beginnings. Clare Sansom explores how the RNA world ...