Learn how sexual selection governs mate choice, but also drives the evolution of species. Examples of physical and behavioural, intra and inter species sexual selection. Biology - Adaptation And Evolution - Learning Points. Selecting a...

In this video, the teacher explains the concept of abstract nouns and how they differ from concrete nouns. Abstract nouns are ideas or feelings that cannot be seen or touched, such as knowledge, generosity, and sadness. The teacher also...

Discover a tiny hummingbird with very unusual tail feathers.



Biology - Animal Kingdom - Learni

ng Points.

There are over 300 spe

cies of hummingbird.

Hummingbirds use specia

lised beaks to feed on...

Why is math the universal language? NASA's Michelle Thaller solves that one. - Mathematics has snowballed from counting to 10 on our fingers, to calculus, to abstract concepts like imaginary numbers that move in 11 dimensions and predict...