But cleverness is hard to define - animals have to contend with different challenges in life and what might be clever or ...

Fear conditioning is a type of classical conditioning that involves pairing an aversive stimulus (such as an electric shock) with either a neutral context (such as a location) or stimulus (such as a ...

A guide with examples for learning this key idea in options trading Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive ...

Elysse Bell is a finance and business writer for Investopedia. She writes about small business, personal finance, technology, and more. Erika Rasure is globally-recognized as a leading consumer ...

I've been writing about software and hardware for PCMag for more than 40 years, focusing on operating systems, office suites, and communication and utility apps. I've specialized in everything related ...

ETFs let you invest in a diversified portfolio via a single transaction. ETF shares trade throughout the day on exchanges like stocks. ETFs generally incur lower costs and are suitable for long-term ...

Flexibility is the ability of your joints to move through their full range of motion without pain or stiffness. It also refers to the pliability of the muscles that support the joints. Flexible ...

If you equate winter with dry skin, sore throats, and congestion, then you may want to consider getting a humidifier for your home. “Outdoor weather conditions directly impact indoor air quality,” ...