Things Worth Noting
Average normal body temperature is similar for men and women, usually around 36.5–37°C (97.7–98.6°F), but small, consistent differences exist. Women often have slightly higher resting temperatures, especially after ovulation, because the hormone progesterone raises basal body temperature by about 0.3–0.5°C. During the menstrual cycle, temperature is typically lower before ovulation and higher in the luteal […]
Biological immortality remains impossible due to fundamental limits in human biology. The Hayflick limit restricts normal body cells to about 50-70 divisions before they enter replicative senescence and stop dividing, acting as a built-in molecular clock. This is driven by telomere shortening—protective caps on chromosomes that erode with each cell division because of the end […]
Sea urchins, long considered brainless animals with just a simple decentralized nervous system (five radial nerves, a circumoral nerve ring, and a diffuse nerve net), are actually one giant distributed brain. A major 2025 study using single-nucleus RNA sequencing on juvenile purple sea urchins revealed that over 60% of their cell types are neuronal, expressing […]
The “God gene” hypothesis by Dean Hamer suggests human spirituality is partly hereditary, linked to the VMAT2 gene, which affects monoamine levels in the brain, potentially providing an evolutionary advantage through optimism. Critics argue spirituality’s complexity beyond genetics, involving cultural and personal factors. Long Version The “God gene” hypothesis, introduced by geneticist Dean Hamer in […]
This article explores the search for the first animal, or the common ancestor of all animals that lived over 600 million years ago. It covers the earliest evidence of life, the first animals, and the rise of multicellular organisms. The search for the first animal remains an exciting and challenging area of scientific research. The […]