पुनर्जागरण काल के किस खगोलशास्त्री ने ग्रहों की गति के तीन नियमों को प्रतिपादित किया, जो यह बताते हैं कि ग्रह सूर्य के चारों ओर कैसे चक्कर लगाते हैं?

Which life-saving antibiotic, discovered by Alexander Fleming, is historically widely known as the 'first wonder drug'?

The world's first successful vaccine was developed for which of the following diseases?

Why is the awe-inspiring beauty of an atomic bomb's mushroom cloud often described as ironical?