Science Daily

1. A simple turn reveals a 1,500-year-old secret on Roman glass

   A museum visit sparked a revelation when a Roman glass cup was turned around and its overlooked markings came into focus. These symbols, once dismissed as decoration, appear to be workshop identifiers used by teams of skilled artisans. The findings challenge centuries of assumptions about how Roman glass was made. They also restore identity and agency to the anonymous makers behind these stunning objects.

2. Living cells may generate electricity from motion

   Cells may generate their own electrical signals through microscopic membrane motions. Researchers show that active molecular processes can create voltage spikes similar to those used by neurons. These signals could help drive ion transport and explain key biological functions. The work may also guide the design of intelligent, bio-inspired materials.

3. A new way to prevent gum disease without wiping out good bacteria

   Scientists are uncovering a surprising way to influence bacteria—not by killing them, but by changing how they communicate. Researchers studying oral bacteria found that disrupting chemical signals used in bacterial “conversations” can shift dental plaque toward healthier, less harmful communities. The discovery could open the door to new treatments that prevent disease by maintaining a balanced microbiome rather than wiping bacteria out entirely.

4. Why consciousness exists at all

   Consciousness evolved in stages, starting with basic survival responses like pain and alarm, then expanding into focused awareness and self-reflection. These layers help organisms avoid danger, learn from the environment, and coordinate socially. Surprisingly, birds show many of these same traits, from subjective perception to basic self-awareness. This suggests consciousness is far older and more widespread than once believed.

5. A hidden climate shift may have sparked epic Pacific voyages 1,000 years ago

   Around 1,000 years ago, a major climate shift reshaped rainfall across the South Pacific, making western islands like Samoa and Tonga drier while eastern islands such as Tahiti became increasingly wet. New evidence from plant waxes preserved in island sediments shows this change coincided with the final major wave of Polynesian expansion eastward. As freshwater became scarcer in the west and more abundant in the east, people may have been pushed to migrate, effectively “chasing the rain” across vast stretches of ocean.