'Once you see it, you can't unsee it': The 'road-trip ruiner' plant is spreading
Oldest rocks on Earth found in Canada, are more than four billion years old
142-year-old shipwreck site now a safe haven for fresh water, habitats
Phytoplankton, key to ocean life, falling 2% per year in North Atlantic
Researchers detect blue-green algae toxin in Lake Erie earlier than ever before
