Search and Discovery
A novel technique for measuring nuclear reaction cross sections may yield long-sought parameters for short-lived isotopes.
Manipulating zero-point fluctuations may pave the way for ultraprecise measurements of forces and positions.
Planet-formation simulations produce the right number of gas giants in our outer solar system.
Issues and Events
Each of four prospective producers of molybdenum-99 says it can satisfy at least half of US demand for the short-lived substance.
Antiproton researchers—who are responsible for the “A” in FAIR—are especially relieved that the project will stay intact.
Committee report urges agencies to trim and standardize their grant-application requirements.
In his later years, Einstein often claimed that he had obtained the field equations of general relativity by choosing the mathematically most natural candidate. His writings during the period in which he developed general relativity tell a different story.
Some of nature’s rhymes—the appearance of similar structures in different areas of physics—underlie the way that string theory potentially unifies gravity with the other forces of nature and eliminates the ultraviolet divergences that plague quantum gravity.
The freedom to choose the size, stiffness, and spatial distribution of macroscopic particles in a lattice makes granular crystals easily tailored building blocks for shock-absorbing materials, sound-focusing devices, acoustic switches, and other exotica.
Many physicists and physics students have seen videos of the famous bridge disaster that occurred 75 years ago this month. Some of what they saw was misleading.