If the Copyright Office has no confirmation that a composer or song-writer is still living and it has been 75 years since the first copyright protection order was granted, or 100 years since the recognized creation date of the piece, it becomes public domain.
What are the symptoms of exposure to blue-green algae? Symptoms from drinking water that contain blue-green algae can include: headaches, nausea, fever, sore throat, dizziness, stomach cramps, diarrhea, abdominal pain, vomiting, muscle aches, mouth ulcers, and blistering of the lips.
Blue green algae are also known as blue algae, blue-green bacteria, cyanobacteria or Cyanophyta. They are found in the phylum Cyanobacteria in the domain Bacteria and are a type of bacteria that produces their own energy from sun-light through photosynthesis, just like algae and plants do.