Click on a label to read posts from that part of the world.
1. The aliens worrying Antarctic observers are not of the cellophane-skin and pumpkin-head variety, but rather more garden variety: Insects, slugs, worms, plant seeds and fungi that sneak in with the fruits and vegetables consumed by the 4,000 scientists who call Antarctica home during the summer season. Tourists are contributing too, carrying plant seeds in on their shoes and clothing. The invasion is encouraging calls for new levels of "biosecurity" to protect the otherwise pristine continent from being further infiltrated. For the moment, simple fungi and mold are the greatest concern because they often carry plant diseases: On the 11,250 fruit and vegetables sent to nine research stations researchers found soil on 12 percent of the food as well as 56 alien invertebrates and 19 different species of mold. On Antarctica's near islands, rats, mice and cats are already devastating bird populations, a risk the mainland doesn't have to worry about ... for now ... since warm-blooded creatures have a hard time surviving sub-sub freezing temps. For now.
More from AOL Travel:
Travel Guides: New York City, San Francisco, Las Vegas, Boston, Chicago, Washington, DC, London, Venice, Beijing, Dubai, Rio de Janeiro, Bangkok, Costa Rica
Travel Ideas: Adventure, Asia Travel, Beaches, Cruises, Europe Travel, Foodie Travel, Healthy Travel, Holiday Travel, International Destinations, National Parks, Skiing, Travel Blogs, Travel Tips, Travel Photography, US Destinations, Weekend Getaways