Google by far beats out competitors as the world’s most popular search engine, but its share of unique searchers has dropped to below 80 percent, according to comScore. The data also shows that Yandex has overtaken Microsoft’s Bing for the fourth spot behind Baidu and Yahoo. However, Bing still has a far greater number of searchers, while Yandex leads Bing in number of seaches. [Source: Search Engine Land]