How Electricity Controls Your Heartbeat? | Inside the Human Heart

The Human Heart | How does Heart work – 3D animation

This is what saves 600,000 people every year during a heart attack. Your heart is running out of time. Every second an artery stays blocked, heart muscle dies — and open-heart surgery isn’t fast enough. That’s why doctors use a coronary stent. A catheter snakes through your wrist or groin to the exact site of the blockage. A balloon inflates, and a tiny metal mesh tube — smaller than your fingertip — locks the artery open permanently. Circulation restored. Heart muscle saved. Patient walking out

This chart shows human brains size over time. They got way bigger, fast. But now they’re shrinking? (No, it’s not the phones!) About 2 million years ago something changed and it altered the course of human evolution. Our brains just started RAPIDLY growing, the organ nearly doubled in size in just a few hundred thousand years. This turning point is what allowed us to evolve into the intelligent species we are today. But now… To learn more, follow along! #evolution #human origins #science

Учёные создали эмбрион из клетки кожи и сперматозоида. Они взяли ядро с ДНК из клетки кожи, поместили его в яйцеклетку без собственного ядра и оплодотворили. Это значит что теоретически двое мужчин могут зачать генетически родного ребёнка. Технология ещё не готова к широкому применению, но в будущем может изменить лечение бесплодия для всех. #наука #медицина #генетика #технологии #будущее