Scientists in northern Alaska are learning about polar bears by scraping snow samples from the tracks they leave behind. That snow contains tiny flecks of the massive creatures — mostly cells shed ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Ultracold gases of unbound atoms have been at the forefront of research into quantum matter since the creation of the first Bose–Einstein condensates in the mid-1990s. But researchers are also keen to ...