一种采用“微小原子云”技术的迷你磁场传感器，第一次成功地跟踪到了人类的心跳。
A miniature magnetic sensor using a tiny cloud of atoms has successfully tracked a human heartbeat for the first time.
多巴胺被认为是“快乐激素”，产生喜悦感；去甲肾上腺素类似于肾上腺素，导致心跳加速和兴奋感，据来自美国罗格斯大学的人类学家，著名的爱情研究者Helen Fisher所说，这两种化学物质共同引起喜悦感，充沛的精力，失眠，强烈的愿望，食欲的减退和集中的注意力。
Dopamine is thought to be the "pleasure chemical, " producing a feeling of bliss. Norepinephrine is similar to adrenaline and produces the racing heart and excitement.
通过它们心跳的下降可以得知它们感到了恐惧；类似的，我们人类感到恐惧时的反应是心跳加快。
Fear was demonstrated by their heart beats decreasing, in a similar way to how our heart rate increases when someone gives us a fright.
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