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My essays:
- A little over 2 200 years ago the Roman navy attacked the Greek port city of Syracuse According to some ancient historians the Greeks defended themselves with an ingenious weapon called a burning mirror a polished copper surface curved to focus the Sun s 80
- Sending humans to Mars have some problems 3
- Should one judge a person by external appearances 73
- Is daily homework necessary 70
- Like many creatures humpback whales migrate long distances for feeding and mating purposes How animals manage to migrate long distances is often puzzling In the case of humpback whales we may have found the answer they may be navigating by the stars much 80
- In recent years many frog species around the world have declined in numbers or even gone extinct due to changes in their environment These population declines and extinctions have serious consequences for the ecosystems in which frogs live for example fro 80
- Why do people work 90
- Will you spend your money to buy a piece of jewelry or a ticket for a concert 70
- Pterosaurs were an ancient group of winged reptiles that lived alongside the dinosaurs Many pterosaurs were very large some as large as a giraffe and with a wingspan of over 12 meters Paleontologists have long wondered whether large pterosaurs were capabl 80
- tpo35 3