In honour of Halloween, check out these eerie science stories — designed to give you goosebumps! See some amazing skeletal images from a biologist and functional morphologist, read the diary of a snake expert doomed to death from a venomous bite, hear about the neuroscience of spooky songs, and more in this harrowing collection from Science Friday.

"What's the oldest tree or other living organism on Earth?" That question was posed to BBC Crowd Science, and it turns out it's a difficult question to answer. The oldest confirmed organism is a bristlecone pine tree in California that's 5,067 years old. But its possible there are a few other organisms on the planet that are much older.

Where are the most likely places for an invasive species to thrive? It turns out: islands and coastal regions. Researchers out of Durham University in the United Kingdom, as well as multiple other universities, recently published a paper detailing the global hot spots for invasive species. The most inundated: the Hawaiian Islands, New Zealand's North Island, and the Lesser Sunda Islands, Indonesia. These data help to inform mitigation strategies preventing further spread of invasive species that

An international collaboration of scientists have deployed a network of sensors in Queen Elizabeth Olympic Park, London. What do the sensors measure? Sound! Ultrasonic bat calls to be specific. When the sensors hear a bat call, which is beyond the hearing of a human, they automatically attempt to determine the species. The data is uploaded to the cloud, and researchers are then able to keep track of the variety of bat species in the park. This experiment is in its early stages, but ultimately