Help me to make a sentence ! (36 until 40) Thank U

36. silk is a natural protein fiber obtained from the cocoons of the mulberry silkworm.

37. scientists detect radio signals from across the universe.

38. archaeologists gather and analyze information by using historical research techniques.

39. the hens lay eggs and each eggs needs incubating for 18 days or longer, after which they hatch.

40. the climbers suffered frostbite while attempting to reach the summit.