The concept of spacetime, first described in Einstein's theory of general relativity, has since been widely studied by many physicists worldwide. Spacetime is described mathematically as a four-dimensional (4D) continuum in which physical events occur, which merges three-dimensional (3D) space, with one-dimensional (1D) time. ... Read full Story
Scientist and medtech entrepreneur J. Craig Venter published the first bacterial genome ever decoded in 1995. The result heralded a new age of discovery for genetics ... Read full Story
Scientist and medical technology entrepreneur J. Craig Venter published the first bacterial genome ever decoded in 1995. The result heralded a new age of discovery for genetics ... Read full Story
Los Angeles public schools are limiting computer use in classrooms over health concerns. But experts say that approach is missing the problem ... Read full Story
This portable smart telescope makes capturing deep-sky images from a backyard easy, but it’s the telelscope’s advanced features that truly impress. ... Read full Story
Part of a SpaceX Falcon 9 rocket is likely to crash into the moon this summer, a new report finds. It poses no danger, but does highlight a worrying trend. ... Read full Story
The recent measles outbreak in South Carolina sickened nearly 1,000 people before public health officials got it under control. Vaccination can effectively prevent further spread ... Read full Story
A rare form of vision loss has been linked to certain GLP-1s, but more so to Wegovy than to other weight-loss drugs in this class. Should you worry? ... Read full Story
Experts say building a lunar colony within the next decade, as NASA and Elon Musk want to, will require finding solutions to problems we don't yet fully understand. ... Read full Story
A genomic analysis of people buried on the border of the ancient Roman Empire show how distinct groups combined after the empire’s fall ... Read full Story
Former National Institutes of Health official David Morens is accused of evading record requests related to the COVID pandemic’s origins and gain-of-function research ... Read full Story
Mount Etna's strange lava has long perplexed scientists, but new research reveals that the volcano formed in a bizarre way — making it unlike any other known volcano on Earth. ... Read full Story
Merriam-Webster's Word of the Day for May 4, 2026 is:
scrupulous \SKROO-pyuh-lus\ adjective
Scrupulous describes someone who is very careful about doing something correctly, or something marked by such carefulness. Scrupulous can also describe someone who is careful about doing what is honest and morally right.
// She was always scrupulous about her work.
// Being an editor requires scrupulous attention to detail.
// Less scrupulous companies find ways to evade the law.
“Scrupulous directors make sure that the sound of their movies is grossly efficient, so that the dramatic meaning of a scene is apparent even in the worst theatre or home system in the country …” — David Denby, The New Yorker, 9 Mar. 2026
Did you know?
People described as scrupulous might feel discomfort if their work is not executed with a sharp attention to detail. Such discomfort might present itself as a nagging feeling, much as a sharp pebble in a shoe might nag a walker intent on getting somewhere. And we are getting somewhere. The origin of scrupulous is founded in just such a pebble. Scrupulous and its close relative scruple (“a feeling that prevents you from doing something that you think is wrong”) both come from the Latin noun scrupulus, “a small sharp stone,” the diminutive of scrupus, “a sharp stone.” Scrupus has a metaphorical meaning too: “a source of anxiety or uneasiness.” When the adjective scrupulous entered the English language in the 15th century, it described someone careful about preserving their moral integrity, but it now is also commonly used for someone who is careful in how they execute tasks.