Dajjal is a person whom the Prophet (may the peace and blessings of Allah be upon him) described as appearing at the end of time. He is sent by Allah as a trial to people. Dajjal will claim godhood and Allah will allow supernatural acts to occur at his hands, such as bringing back to life those he kills, causing the sky to rain by his command, and the earth to produce vegetation by his command. He will have with him what resembles Paradise and Hell. The one he claims is Paradise is in reality Hell, and the one he claims is Hell is in reality Paradise. He will also have two rivers flowing with him. All of these things will be made to happen for him by the Power and Will of Allah. Whoever follows him will disbelieve and be misfortunate and remorseful. Whoever disbelieves him is the true Believer whom Allah has granted success to be of the felicitous. May Allah make us of those who are granted the success of felicity.
During the Golden Period of Islam, the time of the Abbasid Khilafah, from the 8th Century to the 15th Century scientists, geographers, poets, engineers and philosophers amongst others, contributed significantly to their respective fields, by creating new inventions and by preserving and building upon earlier work. Their contributions directly affected every major civilisation to come after them and continue to be invaluable to the present day.