What were major contributions made in biology and chemistry

Read the excerpt from the writings of olaudah equiano, an african who was shipped to the americas on a slave ship. the closeness of the place, and the heat of the climate, added to the number in the ship, which was so crowded that each had scarcely room to turn himself, almost suffocated us. what conclusion can be drawn about slave ships from this description?

What two things did former british prime minister winston churchill affirm in his iron curtain speech?

The decision to annex hawaii was a controversial one