We asked readers to share the items they’ve held on to as reminders of love. The responses ranged from uplifting and funny to heartachingly sad. Share full article Many of the quiet keepsakes started ...

A California teenager discovered more than 1.5 million previously unidentified space objects while analyzing archived NASA data—an achievement that just earned him public praise from NASA leadership ...

Metamorphopsia distorts central vision, making straight lines look wavy and flat objects look rounded. It happens when the retina or macula is damaged by disease, injury, or aging. Common causes ...

Compact objects are compact stellar remnants, such as white dwarfs, neutron stars and black holes and specific types of these objects (e.g., pulsars and boson stars), as well as their larger ...