Which of these were achievements of ancient indian civilization
a. development of ayurvedic medicine and philosophy

b. use of zero and advancements in ironworking

c. determining the length of the year and in the use of pi

d. metallurgy and the invention of the compass

Ateam of scientists studied the sediment at the bottom of an ancient lake. they were able to determine the weather conditions of the indus valley in ancient times. they found that the entire area had suffered a drought after the monsoons declined. this drought lasted 200 years. because of the drought, there wasn’t enough food or water. the people of the indus valley were forced to leave their cities.

Is egypt’s second largest city. aswan cairo alexandria casablanca

How did francis bacon challenge the way of thinking about science