The Pentagon has begun releasing new files on UFOs and says the public can draw its own conclusions on “unidentified ...

Quantum melting observed: Scientists melted electron crystals in tantalum sulfide, revealing a process similar to solid melting but affecting only electronic properties. Potential tech impact: ...

Strange shape spotted: A 2013 infrared video shows an 'eight-pointed star' object moving unpredictably before accelerating ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Arthur Gies Arthur Gies is an editor for Wirecutter's tech coverage. He's ...

Q: What are diffraction gratings? A diffraction grating is an optical component for spectroscopy that splits light into different wavelengths. A typical diffraction grating has thousands of grooves ...