记住，当时许多动物物种的活动范围是不同的，所以所有这些动物实际上都生活在那个地区。
Remember that the ranges of many animal species were different back then, so all these animals actually lived in the region at that time.
用GPS芯片来追踪动物已经有多年的历史了，这种芯片尤其被用来追踪活动范围广的动物，比如海生动物。
GPS chips have been used to track animals for years, especially wide-ranging ones like marine animals.
让我们不要仅仅把它们关在动物园或者小小的岛域保护区内，让它们在全球范围内自由活动。
Let's not just keep them in zoos or even in small island pockets of protected areas.
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