Super-stretchy gel could replace damaged cartilage

" flexible but resilient gel that could be used as artificial cartilage to repair ailing joints is being investigated by US researchers. Made from polymers commonly found in shampoo, the water-based gel could help people with joint diseases like arthritis – a disease...

New Scientist [science news]

Specialized news focused on scientific topics.

detects cocaine in blood or saliva

A whole class of biosensors can be based on this concept. This is not specific to cocaine. This is a method of detecting small molecules and proteins.