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Robotic Aircraft Powered by Hydrogen Fuel
The Ion Tiger UAV tests a hydrogen-powered fuel cell design, which can travel farther and carry heavier payloads.
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Word of the Day
lament
Definition:
A song or hymn of mourning composed or performed as a memorial to a dead person.
Synonyms:
coronach
,
dirge
,
requiem
,
threnody
Word of the Day
provided by
The Free Dictionary
Today in History
This Day in History
provided by
The Free Dictionary
Quiz Me
Of the following instruments, which one is not an adding machine?
Obelisk
Calculator
Abacus
Suanpan
Vote
or View Results
Of the following instruments, which one is not an adding machine?
Obelisk (64.71%)
Calculator (5.88%)
Abacus (0.00%)
Suanpan (29.41%)
Correct answer
Incorrect answer
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