Flowering plants arrived relatively late in geological time, between 290 to 145 million years ago. But once here, they evolved quickly and often displaced many other types of plants. In fact, in terms of species, flowering plants are the dominant plant form on Earth today with more than 300,000 types. Learn how their unique reproductive mechanisms led to this explosion of speciation in such a relatively short time.
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In this full lecture delve into voting paradoxes in outcomes of elections at national, state, and even club levels. Study Kenneth Arrow’s Nobel prize-winning impossibility theorem, and assess the U.S. Electoral College system, which is especially prone to counter intuitive results. […]
In this full lecture you’ll learn the tricks to effective garden maintenance throughout the season: growing more abundant harvests of fruits and vegetables, controlling pests in the most eco-friendly ways, locating the cause of discolored leaves, and more […]
The Ancient Greek language is a language like no other. It records an astonishing array of great works in different genres, stretching across a thousand years of history. Watch lecture 1 from the series Greek 101: Learning an Ancient Language, and you’ll learn the 24 letters of the Greek alphabet using the restored classical pronunciation. […]
Survey the recent crisis in Ukraine and see how the origins of this conflict stem from the last hundred years of the region’s history, which is rife with skirmishes and shifting borders. After providing the historical context, Professor Liulevicius explains the ins and outs of the current crisis, including ethnic divisions within Ukraine and Russia’s attitude toward former Soviet territory. […]
While Mary is present in the Canonical gospels, its really in the early Christian apocrypha that she becomes the leader among the saints. Explore several key texts to uncover what we know about Jesus’ mother, her relationship with the disciples, and what makes her unique among the New Testament figures. […]
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