Why was Ernest Shackleton’s voyage remarkable?

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Physics

Can sunlight provide power?»
               As we use up natural resources such ...
How do jet engines work?»
            Like rockets, jet ...
How does an aeroplane fly? »
               As an aeroplane moves though the ...
What is Greenwich Mean Time? »
               In 1884 an international ...
How do we measure time accurately?»
               After the invention of sundials, ...

Chemistry

How do we describe the elements livermorium, tennessine and oganesson? »
                        ...
What qualities make nihonium, flerovium and moscovium special? »
                    Nihonium is ...
What are the element numbers 110, 111 and 112? »
                      ...
What are the features of bohrium, hassium and meitnerium? »
                      ...
What are the characteristics of the elements 104, 105 and 106? »
                      ...

Biology

Why do leaves change their colour?»
We usually think of leaves as being green in colour. Are they always? Not really. If ...
Why do leaves vary in shape?»
Can you tell the difference between the leaf of a mango tree and that of a jack ...
What are guard cells?»
Leaves have very small opening on their surface. Such openings or pores are known as ...
Do all leaves have the same basic functions?»
Have you ever collected leaves as a hobby? Even if you have not, just observing plants ...
Can a tree heal itself?»
When we are ill, we go to hospital because we need a doctor to examine us and prescribe ...