Operant learning is a process by which a specific behavioural response (such as a lever press) is associated with a biologically salient stimulus known as a reinforcer (such as food). Bruijns et al.

Hundreds gathered to say goodbye when 700-year-old Pizol died. The funeral in Switzerland in 2019 was solemn. Mourners wore black; flowers were laid; a priest spoke. It was a symbolic moment: Pizol ...

UC Davis released a troubling outlook for native California salmon, noting that nearly half of the state’s species will become extinct by 2067 unless changes are made. The bleak forecast increases to ...

On July 30, 2003, a team of Spanish and French scientists reversed time. They brought an animal back from extinction, if only to watch it become extinct again. The animal they revived was a kind of ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Millions have seen the heart-wrenching video of a polar bear clinging to life, its white hair limply covering its thin, bony frame. Shot by Paul Nicklen and Cristina Mittermeier of the nonprofit group ...