The unusual Velvet worm may be a mystery to many, but this weird creature has been around for 500 million years, hiding in the undergrowth. Find out what sets it apart from most other animals. 

How does the blood of Komodo Dragons offer the promise of a new kind of antibiotic? Claire finds out. 

And the Great Molasses Flood of 1919, how did it happen and why did it cause so much havoc? Chris explains.