Courses from 1000+ universities
Coursera sees headcount decrease and faces lawsuit in 2023, invests in proprietary content while relying on Big 5 partners.
600 Free Google Certifications
Marketing
Digital Marketing
Language Learning
Six Sigma Part 1: Define and Measure
Product Management Essentials
How to Succeed at: Interviews
Organize and share your learning with Class Central Lists.
View our Lists Showcase
Explore Early Paleozoic life in less than an hour with GEO GIRL. Dive into major life events and organisms during the Cambrian and Ordovician periods.
Explore how oxygen transformed life on Earth with GEO GIRL's short online program. Learn about early metabolisms, the Great Oxidation Event, and the evolution of complex organisms.
Explore the 'Cambrian Explosion' with GEO GIRL, delving into the complexity of pre-Cambrian life, the extinction of Ediacaran Fauna, and the evolution of modern animal groups.
Explore the evolution of life during the Neogene Period, from early apes to humans, in this short, engaging study by GEO GIRL. Delve into the origins of Homo sapiens and their ancestors.
Explore the climatic consequences of life transitioning to land, leading to Earth's first two Mass Extinction Events, in this short online study by GEO GIRL.
Explore the metamorphism of pure and impure carbonates in less than an hour with GEO GIRL. Learn about marble protoliths, quartz-bearing carbonate metamorphism, and more.
Explore the metamorphism of basalt and gabbro with GEO GIRL. Learn about mineral transitions under different pressures and temperatures in less than an hour.
Explore the Early Cenozoic Era with GEO GIRL, delving into the evolution of mammals, the reign of Megalodon, and the transformation of Earth's landscapes. Duration:
Explore the Paleogene climate shifts, from the Paleocene Eocene Thermal Maximum to the Eocene-Oligocene Ice Age, in this short, informative study by GEO GIRL.
Explore the evolution of photosynthesis, from the first photosynthesizing organisms to the impact of oxygenic photosynthesis on Earth, in this short online offering by GEO GIRL.
Learn to identify metamorphic rocks and minerals in hand specimens and thin sections with GEO GIRL. This less than 1-hour material covers marble, quartzite, phyllite, schist, and more.
Explore sedimentary structures with GEO GIRL in under an hour. Learn about laminations, cross bedding, ripples, graded bedding, growth bedding, and mud cracks.
Explore crystalline textures in sedimentary rocks with GEO GIRL in under an hour. Learn about cement, replacement, veins, oolites, and more. Understand the difference between sedimentary diagenesis and metamorphism.
Explore the fabrics and textures of detrital sediment and sedimentary rocks, understand the impact of grain size, sorting, shape, and packing on porosity and permeability with GEO GIRL in under an hour.
Learn about metamorphic petrology, types of metamorphism, and rock classification in less than an hour with GEO GIRL. Gain practical tips for identifying metamorphic rocks.
Get personalized course recommendations, track subjects and courses with reminders, and more.