एल्वारेज़ परिकल्पना (Alvarez hypothesis), जो यह प्रस्ताव करती है कि डायनासोर का सामूहिक विलोपन पृथ्वी पर एक बड़े क्षुद्रग्रह (asteroid) के प्रभाव के कारण हुआ था, मुख्य रूप से किस वैज्ञानिक द्वारा प्रतिपादित की गई थी?

Which Indian independence movement leader was primarily known for his philosophy and practice of non-violent civil disobedience?

Who gave the call for 'Do or Die' during the Quit India Movement in 1942?

Which of the following revolutionary pairs were imprisoned together in Cellular Jail and faced harsh conditions, contributing significantly to the Indian independence movement?