Fitbit is among the most recognizable names when it comes to fitness trackers, and if you've had your eye on one, you don't need to wait until the end of the month for Black Friday deals.

Below, you’ll find individual breakdowns of some of the top options available – like the Fitbit Charge 6, Apple Watch Series 10, and Garmin Forerunner 165 – as well as advice on how to pick ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The best fitness trackers you can buy today range in price from just under $50 to over $400 ...

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气候变化剧烈影响下，未来地球或将因极端高温和生境变化不适宜人类居住。 如果温室气体排放不大幅减少，到2500年，亚马逊将变成荒地，爱荷华将变得湿热，印度将过于炎热而不适合人类生存。