From chest straps to wrist-based wearables, these are the top heart rate monitors I've tested and recommend buying.
Interesting Engineering on MSN
EV lithium metal battery test cell hits 9,000-hour stability milestone with new gel
They have developed a fluorinated deep eutectic gel electrolyte (DEGE) that overcomes critical safety and performance hurdles ...
There were still 32,000 new cases of HIV in the U.S. in 2022. And about thousands of people still die annually from AIDS. HIV ...
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