Virtually all of the major bedding manufacturers have either gone totally to that design, abandoning the two-sided design, or have allotted a healthy percentage of their products to it. mattress construction appears to be a one-sided issue
Bird Spider and Bird Eating Spiders. The Chinese bird spiders are venomous spiders capable of delivering a rather dangerous bite. Their LD50-value is low and in the same range as many loxosceles species (brown recluse spiders). Chinese bird spiders are tarantulas, just like the goliath bird eating spider is a tarantula. Chinese bird spiders are widely distributed in Asia and are abundant in Southern China.
Can a spider bite from the biggest spider poison a human being? Big spiders look scary, but are they also poisonous? Here are two of the largest recorded spiders in recent history. The biggest spider as listed in the Guinness Book of World Records is the male Goliath bird-eating spider, which belongs to the tarantula spider family. Its scientific name is Theraphosa blondi. The largest Goliath bird-eating spider was collected at Rio Cavro, Venezuela in April 1965 by members of the Pablo San Martin expedition.