For the second time, astronomers have obtained the image of a black hole; this time, the one at the centre of our own galaxy. Notwithstanding claims to the contrary, this shows that not everything is perceived through vision.
In around 770 AD, an embassy from India, including an astronomer, visited the then Abbasid Caliph Al-Mansur in Baghdad. The meeting was to open up an avenue for a fruitful interaction between India and the Arab world.