A tick species that's native to Asia has now spread to the United States, and it's popping up in numerous places along the East Coast, according to U.S. officials. Females can reproduce asexually and lay thousands of eggs. Female longhorned ticks don't need a male to reproduce. They can spawn asexually using a process known as parthenogenesis. After feeding, a single female can lay around 2,000 eggs, according to the Pennsylvania Department of Health. That's enough to establish a tick population in a new location, the U.S. Department of Agriculture (USDA) says. They suck so much blood, it can cause...