Conversation so far:
how did the portuguese efforts to reach asia differ from columbus efforts
Christopher Columbus unsuccessfully set sail in search of a western route to Asia, while Portuguese Vasco da Gama was the first European to reach India by sailing around Africa
who opened the sea route from europe to asia
In 1488, Portuguese explorer Bartolomeu Dias became the first European mariner to round the southern tip of Africa, opening the way for a sea route from Europe to Asia

Question: when did the explorers arrive
Self-contained rewrite: when did portuguese explorers arrive in india