Your average daily heart rate is a useful metric; so is your daily step count. Combining the two might be even better.

Chinese scientists have developed a redox flow battery with 87.9% energy efficiency and 850-cycle lifespan, overcoming key ...

Rebirth of Souls. From Konpaku, to Hakugeki attacks, Kikon moves, Hoho Flash Steps, Chain Reverses, Reverse Bursts, and so on ...