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Shuttle Thermal Protection
When the Space Shuttle reenters earth's atmosphere, it needs protection from the heat. See how NASA's shielding allows the Shuttle to go through reentry over and over again. credit: NASA
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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
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The Free Dictionary
Today in History
This Day in History
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Quiz Me
Which radioactive element keeps the Earth's core hot?
Uranium
Plutonium
Titanium
Magnesium
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Which radioactive element keeps the Earth's core hot?
Uranium (55.56%)
Plutonium (14.81%)
Titanium (0.00%)
Magnesium (29.63%)
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