The electron microscope was invented in germany during the 1930's by
anton van leeuwenhoek
robert hooke
hans and zaccharias janssen
charles spencer
max knott and ernst ruska
spencer, maybe?

Research cheetahs on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? -cheetah how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.

Moving down the ramp from 6 meters to

How dose plate tectonics effect climate