we know what ancient arabs look like

its not different from modern arabs

This is not to say the pure 90% Arabs went extinct but obviously they are an extremely small and vanishing minority
Myriad populations from all corners of the world moving in and settling on our lands, as early as the persians who defected to the muslim army, then you had indian zutt jatts settling in south iraq, abbasid bringing god knows how many black slaves to basra that even after nearly 800 years there is still a sizable black population in basra, inflow of slavic women from Ottomans and Abbasids.

>who are the original arabs.

The original Arabs inhabited a landmass that would encompass modern day north Saudi Arabia, Jordan and Southeastern Syria. Their first leader in recorded history was called Jundub جندب. They were most settled across Syria with a scattered population in north iraq that build kingdomes like hatra and osroenne in north Iraq and the lakhmids in south iraq but the vast majority were in Syria.

The original Arabs are extremely closely related to Assyrians and Syriac populations.

>>212255005
That is a Syrian Arab, Syrians are the most pure Arabs. I am not Syrian btw.