20210502 Rietvlei自然保护区内的雄性布氏斑马 必应壁纸

布氏斑马 Rietvlei自然保护区内的雄性布氏斑马 尽管这些波切尔斑马可能在打架，但对我们来说，它们看起来像是在分享笑声。因为今天是世界欢笑日，我们一直在试着想象什么样的笑话会让斑马发笑。狮子为什么把小丑吐出来?因为他尝起来很奇怪。也许吧。不管怎样，五月的第一个星期天是世界欢笑日，以此来提醒人们笑对身心健康的真正益处。笑对你的健康有临床证明的积极影响，这可不是开玩笑。专家(是的，确实有专家)同意笑可以降低血压，释放内啡肽，锻炼腹肌，减少压力荷尔蒙，甚至促进T细胞抵抗感染。即使你没有感觉，假装也很有效。波切尔斑马是以英国博物学家和探险家威廉·约翰·波切尔(William John Burchell)的名字命名的，他在19世纪早期广泛游历南非，在那里他研究了这些斑马和许多其他动物。波切尔斑马的特点是腰部有一到两个微弱的条纹，与明显的条纹相形见色，但除此之外，波切尔斑马与其他平原斑马非常相似。波切尔斑马的社会结构是一匹种马领导一群母马，整个群体被称为“后宫”。一匹年轻的种马可能会试图把一匹母马引到他自己的后宫，这种努力可能会导致与常驻种马的粗暴对抗。

原文:

Even though these Burchell's zebras are probably fighting, to us it kind of looked like they were sharing a laugh. And since today is World Laughter Day, we've been trying to imagine what kind of joke would make a zebra laugh. Why did the lion spit out the clown? Because he tasted funny. Maybe. Anyway, World Laughter Day is celebrated on the first Sunday of May to remind people of the very real physical and mental health benefits of laughter. It's no joke that laughter has a clinically proven positive effect on your well-being. And experts (yes, there are experts) agree that laughing lowers blood pressure, releases endorphins, works your abs, reduces stress hormones, and even boosts T cells that fight infection. And even if you're not feeling it, faking it still works.The Burchell's zebra is named for William John Burchell, an English naturalist and explorer who in the early 1800s traveled extensively in South Africa, where he studied these and many other animals. The Burchell's zebra is distinguished by one or two faint stripes on its haunches that appear to shadow the bold stripes, but otherwise it strongly resembles other plains zebras. The social structure of Burchell's zebras is based on a stallion leading a herd of mares—the whole group is called a harem. A young stallion may attempt to lead one of the mares away to his own harem, an effort that may result in a rough confrontation with the resident stallion.

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