We categorise reactions by the direction of this energy change. If energy is released by a reaction, the reaction is exothermic. If energy is absorbed by a reaction, the reaction is endothermic. When ...

A presenter-led science video investigating exothermic and endothermic reactions, with Dr Maggie Aderin-Pocock and Dr Alex Lathbridge.

These systems are characterized by alternating layers of reactive materials that can undergo exothermic reactions, releasing substantial amounts of heat. This heat can be harnessed for various ...

Allergies are an immune system reaction to substances called allergens. The cause a range of symptoms from a stuffy nose to itchy eyes to difficulty breathing. How long allergies last varies based on ...

Reactions to a recent immunization (vaccine) Most are reactions at the shot site (such as pain, swelling, redness) General reactions (such as a fever or being fussy) may also occur ...

Allergic reactions in babies and infants can range from mild to severe or even life-threatening. Emergency symptoms of anaphylaxis (a severe allergic reaction) can develop within minutes. Infants can ...

Reaction formation is a defense mechanism in which people express the opposite of their true feelings, sometimes to an exaggerated extent. For instance, a man who feels insecure about his ...

Raptors win their second game of the season on the road.

Nobody thought the Rose Bowl would play out like this. Not Ohio State, not the oddsmakers and certainly not the Oregon Ducks. The Buckeyes dominated the Ducks on both sides of the ball and walked out ...

Learn how to update to the latest iOS. Have you wondered what it means when your text is emphasized or what that question mark at the top of your text means? These are reactions, and there's a simple ...

To grieve her mother, Ashley Judd first had to heal trauma ...