Latest Biology & Health News

The 12 hallmarks of aging, why evolution allowed us to grow old, and what interventions — from rapamycin to reprogramming — actually have evidence.

How testosterone, estrogen, and progesterone shape the body, the menstrual cycle, puberty, and menopause — and the science of hormone therapy.

Your skin hosts ~1,000 bacterial species, fungi, viruses, and mites. How the skin microbiome shapes acne, eczema, odor, and immunity.

How the circadian rhythm works: the brain's master clock, clock genes, light, melatonin, and what shift work and late eating do to a 24-hour body clock.

Three types of tears, the chemistry of emotional crying, and why humans are the only species that weeps from feelings. The science of tears explained.

How the lungs move air, exchange oxygen and CO2, and what goes wrong in asthma, COPD, pneumonia, and at high altitude. A clear, evidence-based explanation...

What yawning actually is, why it's contagious, and why brain cooling — not oxygen — is the leading scientific explanation.

How genetic data and machine learning guide drug choice, and what trials of cancer, warfarin, and antidepressant testing actually show.

What cholesterol is, how LDL and HDL differ, how artery plaques form, and what trials show for statins, PCSK9 drugs, bempedoic acid, and inclisiran.

Skin's three layers, how it protects you, why it ages, and the biology of pigment, sweat, and sensation in your body's largest organ.

How pregnancy works: fertilization, implantation, placenta, the three trimesters, labor, complications, and how modern medicine has changed outcomes.

How the human heart pumps blood: chambers, valves, electrical conduction, cardiac cycle, and the most important diseases and treatments.