布氏斑馬 Rietvlei自然保護(hù)區(qū)內(nèi)的雄性布氏斑馬 盡管這些波切爾斑馬可能在打架，但對我們來說，它們看起來像是在分享笑聲。因為今天是世界歡笑日，我們一直在試著想象什么樣的笑話會讓斑馬發(fā)笑。獅子為什么把小丑吐出來?因為他嘗起來很奇怪。也許吧。不管怎樣，五月的第一個星期天是世界歡笑日，以此來提醒人們笑對身心健康的真正益處。笑對你的健康有臨床證明的積極影響，這可不是開玩笑。專家(是的，確實有專家)同意笑可以降低血壓，釋放內(nèi)啡肽，鍛煉腹肌，減少壓力荷爾蒙，甚至促進(jìn)T細(xì)胞抵抗感染。即使你沒有感覺，假裝也很有效。波切爾斑馬是以英國博物學(xué)家和探險家威廉·約翰·波切爾(William John Burchell)的名字命名的，他在19世紀(jì)早期廣泛游歷南非，在那里他研究了這些斑馬和許多其他動物。波切爾斑馬的特點(diǎn)是腰部有一到兩個微弱的條紋，與明顯的條紋相形見色，但除此之外，波切爾斑馬與其他平原斑馬非常相似。波切爾斑馬的社會結(jié)構(gòu)是一匹種馬領(lǐng)導(dǎo)一群母馬，整個群體被稱為“后宮”。一匹年輕的種馬可能會試圖把一匹母馬引到他自己的后宮，這種努力可能會導(dǎo)致與常駐種馬的粗暴對抗。

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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