M31N 2008-12a is a rare phenomenon called a recurrent nova, and it may hold the key to understanding the lives and cataclysmic deaths of massive stars.

ExoMars 2016 is about to launch, and The Arecibo Observatory is picking up some mysterious signals this week on SciShow Space News!

Everyone loses their temper from time to time — but the stakes are dizzyingly high when the focus of your fury is your own child. Clinical psychologist and renowned parenting whisperer Becky Kennedy is here to help. Not only does she...

Learn how to solve problems with arcs of a circle. An arc is a curve made by two points on the circumference of a circle. The measure of an arc corresponds to the central angle made by the two radii from the center of the circle to the...

Following the tragic events in Orlando earlier this month, there were many reports of gay men being turned away when they went to donate blood. Why do non-celibate gay men have their blood donations rejected? Turns out, it's an outdated...

How did the two political parties switch? A look at the movement of white Southern Democrats to the Republican Party. Perfect for APGOV students, political science students, life long learners and the cray cray on the internets. WARNING...

Swift 2 is a multi-paradigm programming language that has expressive features familiar to modern functional languages, and does not forget the object-oriented features of Objective-C. Things that took a block of code in...

👉 Learn the basics of graphing a tangent and a cotangent function. To plot the tangent and the cotangent graph we choose a set of points and form a table of values with which we plot the points on the x-y coordinate axis to obtain the...

Mikki vs the World is a creative, funny, and factual series designed to help teens get a grip on what’s happening inside their heads. Mo brings out all the calming devices to help Dr. M stay level-headed on a call with her sister. It...

MOT 1948: NEW DELHI, INDIA: Street w/ HUGE crowd of people, soldier on horseback w/ sword drawn turning horse in crowd, women looking, watching praying. Hindusthan Standard HEADLINES: 'Mahatma Gandhi Shot Dead' 1/30/1948.

👉 Learn about the special right triangles. A special right triangle is a right triangle having angles of 30, 60, 90, or 45, 45, 90. Knowledge of the ratio of the length of sides of a special right triangle enables us to solve for any...

This video provides an electric presentation on sectors and arc lengths of circles. The presenter explains the key information needed to understand the topic, including the circumference and area formulas of a circle. The presentation...

Learn how to divide rational expressions. A rational expression is an expression in the form of a fraction, usually having variable(s) in the denominator. Recall that to divide by a fraction, we multiply by the reciprocal of the...

👉 Learn how to graph quadratic equations by completing the square. A quadratic equation is an equation of the form y = ax^2 + bx + c, where a, b and c are constants. The graph of a quadratic equation is in the shape of a parabola which...

Empathy is a term we hear a lot, but what does it mean and how does it work? Looking back through art history, we find many moments when art has allowed us to share in the feelings of others, from Maya Lin's Vietnam Veterans Memorial, to...

Retired Supreme Court Justice Stephen Breyer discusses the unique dynamics and evolution of the court over time, the decision-making process and his legacy with Wall Street Journal Editor in Chief Matt Murray.

MOT 1950: RUBBER TAPPING: COLOR: VS Liberian male worker adding anticoagulant to cup on rubber tree. MCU White latex dripping from incisions in tree bark into cup. Plantation, natural rubber trees, sap, Harbel, Liberia

En las selvas tropicales, las plantas compiten por el espacio y las enredaderas crecen hasta los 900 m de longitud. Sin embargo, los peligros internos no son nada en comparación con las amenazas externas.
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Limnognathia maerski is one of the smallest known animals, yet has one of the most complicated jaw structures in the animal kingdom. It is currently the only species in phylum micrognathozoa that humans know about, however, there are...

👉 Learn how to solve problems with arc lengths. You will learn how to find the arc length of a sector, the angle of a sector, or the radius of a circle. An arc of a circle is the curve between a pair of points on the circumference of the...

Sister Rosetta Tharpe was one of the most influential artists of the 20th Century born on the 20th March 1915 in Arkansas, U.S. She was a talented singer, songwriter, and recording artist who attained popularity in the 1930s and...

This video explores the various alternative ways in which economic development within countries can be measured beyond the commonly used Human Development Index (HDI). The video discusses the limitations of HDI and introduces alternative...

MOT 1937: VINTAGE 1917 EPHEMERA: Poster: Victor Records ad 'The Dixieland Jass Band' (note spelling variations of Jass album 75 cents) Billing poster: Eisenweber (Columbus Circle at 58th) first New York City venue. Music memorabilia.

Apple’s September event may look a bit different this year, but the (virtual) show will still go on. Expect to see the new Apple Watch Series 6 and updated iPad Air at the September 15 “Time Flies” event. Rumors suggest that Apple will...