Circa 1500:
Portuguese explorer
discovers Brazil
Portuguese explorer Pedro Álvares Cabral landed near present-day Pôrto Seguro, Brazil, while tracing Vasco da Gama's 1497–99 route to India.
1921: SC Bose
quits civil services
Subhash Chandra Bose resigned from the Indian Civil Service under the British regime and later joined the independence movement.
1970: First
Earth Day
The first Earth Day was celebrated after peace activist John McConnell’s proposal to UNESCO seeking a day to honor Earth.
1977: Optical
fiber first used
Optical fiber was used to carry live telephone traffic for the first time.
2016: Paris
Agreement signed
More than 170 countries signed the Paris Agreement on climate change, resolving to cut greenhouse gas concentrations.
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