This document has been published in the Federal Register. Use the PDF linked in the document sidebar for the official electronic format.

Lost spacecraft: SpaceX said Thursday that its Starship spacecraft — which was meant to lap Earth and splash down in the Indian Ocean — exploded not long after its 7th test flight took off ...

This document has been published in the Federal Register. Use the PDF linked in the document sidebar for the official electronic format.

Fluorescent dyes are non-protein molecules that absorb light and re-emit it at a longer wavelength. They are often used in the fluorescent labelling of biomolecules and can be smaller or more ...

Newcastle's Ballast Hills Burial Ground, where about 40,000 people are buried, was used from the 1600s until 1853. Newcastle University academics are exploring its history and are appealing for ...