Two Relativity limericks -- Authors unknown to me

[lookagain]

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$\displaystyle There \ was \ a \ young \ lady \ named \ Bright$

$\displaystyle Who \ traveled \ much \ faster \ than \ light$

$\displaystyle She \ went\ out \ one \ day$

$\displaystyle In \ a \ relative \ way$

$\displaystyle And \ came \ back \ the \ previous \ night!$



$\displaystyle Said \ the \ Bright \ one \ to \ her \ friends \ in \ chatter$

$\displaystyle I \ have \ learned \ something \ new \ about \ matter$

$\displaystyle As \ my \ speed \ was \ so \ great$

$\displaystyle Much \ increased \ was \ my \ weight$

$\displaystyle Yet \ I \ failed \ to \ become \ any \ fatter!$