Neutron stars are formed from the core of some starrs. Neutron stars generally have a radius of only around 12 km. With masses exceeding 1.4 times that of the Sun, these are some of the densest objects in the Universe. A tablespoonful of...

Ophelia the opossum and Lollipop the skunk get their first try on a huge running wheel. Do they like it? Will they be able to use it?

This video gives a short introduction to the course and the prerequisites for the course.
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This clip is from the chapter "Welcome Section" of the series "Quick JavaScript Crash Course - Modern and Advanced JavaScript".In this...

In nature, all organisms compete with each other for resources in order to survive. Competition between members of the same species is what makes organisms evolve. This theory of competition and ‘survival of the fittest’ is called...

Interactions between species are what define ecological communities, and community ecology studies these interactions anywhere they take place. Although interspecies interactions are mostly competitive, competition is pretty dangerous,...

Jessi's in her lab mixing up something scary cool: potions! Join her to learn about different kinds of mixtures and how you can mix up your own potions using things you have at home!

Just like the names of products and companies, animals' names can affect how we feel about them...and changing the name of a species might actually help us save...

The competitive exclusion principle predicts that there would just be a few species of plankton, but instead there are thousands.

Paul Andersen explains the differences between an r and a K selected species. He starts with a brief description of population growth noting the importance of; r or growth rate, N or number of individuals in the population, and K the...

A look at the main causes of extinction from new diseases to climate change to competition from another species. Biology - Adaptation And Evolution - Learning Points. Extinction is a natural part of the evolutionary cycle. It occurs more...

👉 Learn all about angles of trigonometry. In this playlist, we will explore what makes up an angle and how to graph an angle in degrees or radians to determine the quadrant. We will then take a look at angle relationships such as...

From this video you should know the difference between interspecific and intraspecific, and that interactions can be positive, negative or neutral. Interspecific interactions are between different species (think international)....

Interactions occur in every habitat, some are between members of the same species - and are called intraspecific interactions. Whereas, some are between members of different species and are called interspecific interactions. Just think...

Headlines recently blared about the new review that looked at how effective masks are at preventing the transmission of flu-like disease. Cochrane reviews are well respected, and the media coverage about the recent review has been hard...

Multiplication table and the distributive property.

This engaging series of videos uses colorful animations and on-location footage to illustrate some of the amazing ways plants reproduce. The reproduction processes in bryophytes, ferns, gymnosperms, and angiosperms are highlighted....

Learn how Robert Smalls led a daring escape aboard the Confederate ship, the Planter, and delivered 17 enslaved people to freedom. Discover his pivotal role in providing crucial intelligence to the Union, meeting President Lincoln, and...

With a better understanding of population ecology, we are ready to zoom out and look at community ecology, which involves interactions between species, as well as landscape ecology, which will broaden our understanding of ecosystems. How...

This video summarizes the section.<br<br/>/>

This clip is from the chapter "Scrum Roles - Understanding the Characteristics of Each Role" of the series "Agile Project Management".This section explains the different Scrum roles.

This video is about the Formula of an Ionic Compound lab where different ratios of two chemicals are used to find the ratio that produces the most precipitate. That ratio is the correct ratio for the formula of the precipitate.

Global pandemics, like swine flu, are often caused by viruses that have jumped from animals to people. Scientists in Cameroon are working with local bush meat hunters to monitor this viral transmission. They hope that their work will...

Until recently, scientists thought cannibalism was a rare response to starvation or other extreme stress. Well-known cannibals like the praying mantis and black widow were considered bizarre exceptions. But now, we know they more or less...

Even though less than 1% of Earth's water is freshwater, it's the home for 50% of fish species. This is the Freshwater Paradox.

The Triassic was full of creatures that look a lot like other, more modern species, even though they're not closely related at all. The reason for this has to do with how evolution works and with the timing of the Triassic itself: when...