Researchers created a quicker method to detect drug resistance in tuberculosis bacteria. Standard tests require waiting four to eight weeks for bacterial growth, but the new Raman-DIP technique uses single-cell imaging of heavy water processing to show if antibiotics work within 50 hours. It proved fully accurate for four major drugs across multiple strains.
Study of nearly 400 fossils from 21 hominin species found moderate signs of gradual body size growth over time. Much stronger evidence showed a sharp increase among later Homo species, excluding Homo habilis, likely with the emergence of H. erectus. Overall results indicate human body size changed in distinct steps among recent ancestors rather than rising steadily.
Satellite tags on green sea turtles showed they swim in one direction for long stretches without constant adjustments, even when drifting. They make occasional multi-hour corrections mid-ocean to realign. Consistent headings day and night suggest reliance on Earth’s magnetic field, with no sleep during migration.
