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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
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Quiz Me
What is believed to be the largest animal that ever existed?
Argentinosaurus
Woolly Mammoth
Blue Whale
Megalodon
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What is believed to be the largest animal that ever existed?
Argentinosaurus (22.81%)
Woolly Mammoth (7.02%)
Blue Whale (43.86%)
Megalodon (26.32%)
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