EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Hacker News·Jul 24·5 min read
Sperm Whales blow bubbles to achieve restful, vertical sleep
TL;DR
New research reveals that sperm whales use gas bubbles to regulate buoyancy, allowing them to sleep vertically just below the ocean surface. This unique sleeping position helps them avoid surface wave action and conserve energy.
✦ Why It Matters
Consider how buoyancy regulation could inspire designs in underwater robotics or marine technology.
Key Takeaways
- Explore buoyancy control mechanisms in marine technology.
- Investigate gas exchange processes in biological systems.
- Consider implications for underwater robotics design.
- Study the effects of sleep behavior on marine mammals.
How It Works
Sperm whales achieve vertical sleep by releasing gas bubbles, which helps them regulate their buoyancy. This mechanism allows them to remain just below the surface without expending energy to dive deeper.
The release of bubbles counteracts the natural positive buoyancy from the spermaceti oil in their heads, enabling them to maintain a near-neutral buoyancy state while resting.