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Director / Editor: Victor Teboul, Ph.D.
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Independent and neutral with regard to all political and religious orientations, Tolerance.ca® aims to promote awareness of the major democratic principles on which tolerance is based.

In what order did the planets in our solar system form?

By Christopher Palma, Teaching Professor of Astronomy & Astrophysics, Penn State
Lucas Brefka, Ph.D. Student in Astronomy & Astrophysics, Penn State
Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to CuriousKidsUS@theconversation.com.


Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky


A cloud of collapsing gas created our Sun, the first thing to form in our…The Conversation


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