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Q & A: Earth staying slim

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Most recent answer: 11/10/2011
Q:
on school a teacher told me that however the population of the earth is growing earth isn't getting heavier. Is this true? And why?
- sijmon van abbema (age 14)
Schettens, Friesland, Nederland
A:
Sure- When I gain weight, it comes from food I eat. More weight for me means less weight for the rest of the world. The same goes for our species as a whole.

Mike W.

(published on 11/10/2011)

Follow-Up #1: asteroid weight gain

Q:
The only way for the Earth to get heavier is from asteroid impacts.
- Anonymous
A:
True, if you include meteorites.

Mike W.

(published on 11/10/2011)

Follow-up on this answer.