News in Brief
- Life
Why cracking your knuckles can be so noisy
Knuckles crack due to the partial collapse of bubbles in joint fluid, a new study suggests.
- Materials Science
Live heart cells make this material shift color like a chameleon
A new material made of heart cells from rats and hydrogel changes color as the living cells contract and relax.
- Neuroscience
Brain waves of concertgoers sync up at shows
During a live musical performance, audience members’ brain waves get in sync.
- Neuroscience
Parents’ presence promotes a child’s pluck
Parents’ presence or absence during a learning exercise determines whether their child is fearful later, or willing to explore.
