There's two times more carbon in the earth's soil than in all of its vegetation and the atmosphere -- combined. Biogeochemist Asmeret Asefaw Berhe dives into the science of soil and shares how we could use its awesome carbon-trapping...

Pupil outcome: I can explain who Thomas Hobbes was, his context, and why his religious views were considered controversial. Key learning points: - Thomas Hobbes was an English philosopher who lived during the Renaissance and...

Catastrophic Events defines catastrophic events and describes examples of both natural and man-made events.