The Holy Grail of Planetary Astronomy: The Search for Earth's Twin

Every Wednesday, Michio Kaku will be answering reader questions about physics and futuristic science. If you have a question for Dr. Kaku, just post it in the comments section below and check back on Wednesdays to see if he answers it.


Today, Dr. Kaku addresses the following question:

A recently discovered planet named Kepler 22b apparently has a very, very similar composition to Earth, although I don’t think they have it exactly figured out yet. What do discoveries like this mean and what is the possibility of many other earth-like planets being out there?

Watch Dr. Kaku's response here:

Car culture and suburban sprawl create rifts in society, claims study

New research links urban planning and political polarization.

Pixabay
Politics & Current Affairs
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  • Decades of car-centric urban planning normalized unsustainable lifestyles.
  • People who prefer personal comfort elect politicians who represent such views.
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Scientists reverse hair loss by making scalp "smell" sandalwood

It turns out the human scalp has an olfactory receptor that seems to play a crucial role in regulating hair follicle growth and death.

Photo: malehmann via Flickr
Surprising Science
  • Scientists treated scalp tissue with a chemical that mimics the odor of sandalwood.
  • This chemical bound to an olfactory receptor in the scalp and stimulated hair growth.
  • The treatment could soon be available to the public.
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NASA astronomer Michelle Thaller on ​the multiple dimensions of space and human sexuality

Science and the squishiness of the human mind. The joys of wearing whatever the hell you want, and so much more.

Flickr / 13winds
Think Again Podcasts
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  • What would happen if you got a spoonful of a neutron star?
  • Why do we insist on dividing our wonderfully complex selves into boring little boxes
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