In the given sentence identify the segment which contains the grammatical error.

Scientist have recently announced that a more effective antidote for snakebite venom has been made.

Scientist have

The grammatical error in the sentence "Scientist have recently announced that a more effective antidote for snakebite venom has been made" is in the phrase "Scientist have".

The subject of the sentence is "Scientist", which is plural. The verb "have" must also be plural. So, the correct sentence is "Scientists have recently announced that a more effective antidote for snakebite venom has been made."