Indeed, since the 1970s, while the world was warming, polar bear numbers increased dramatically from around 5,000 to as many as 25,000 today - higher than at any time in 20th century.

Curriculum-linked learning resources for primary and secondary school teachers and students. Videos, games and interactives covering English, maths, history, science and more!

Aerospace Engineering is at the cutting edge of technology, understanding and applying scientific principles to the design, development and service of some of the most technologically advanced ...

In comparison to 4G, 5G wireless needs to support a broader range of applications. Therefore, both low-density parity-check (LDPC) codes and polar codes have been standardized by 5G new radio (NR) to ...

a complex numbers, 2d/3d graphing, arbitrary precision, vector/matrix, ... The canvas as the Cartesian plane. web canvas math graph geometry graphing-calculator 2d 2d-graphics cartesian ...