I finally found this, as I was working on geth :
web3.eth.getBlock(13, function(e, r) { blockInfo = r; });
undefined
blockInfo
{
difficulty: 131072,
extraData: "0xd783010703846765746887676f312e392e31856c696e7578",
gasLimit: 2126793,
gasUsed: 21000,
hash: "0xfb9d5eccda077c720a57343e2c1e6e3298bab1256a35170659e219bba96d0436",
logsBloom: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
miner: "0x80b7323d40e36fe32f6838aa92ca5f1367492c57",
mixHash: "0x7e5161377886b57cf84e58f631e9d13f0e627decbab42422c199234e064385bb",
nonce: "0x28fd8f84deabdafc",
number: 13,
parentHash: "0xc641b8031366b7e3a6cdcd4a674e2b40d76abe9ca581c108f851f16a5e331271",
receiptsRoot: "0x78ce77b839224d44e0a98f64b943fbe4ffd49e467edb741e8819bf19caacba6d",
sha3Uncles: "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
size: 643,
stateRoot: "0xce5a1bc5be36de30c06eb0245924f2183d0cd27461c36325d53ad9e7c9291b43",
timestamp: 1532027300,
totalDifficulty: 1708170,
transactions: ["0xa95236a540aa01e519e1fb3c0519924a09c9427c2ae3f0c4fec6a46d48d6fe31"],
transactionsRoot: "0xa74e9ef5f851719122e8d019bdf904b6c9795f953cec28cfea54d7aafa66c50a",
uncles: []
}
This is actually all the basic informations included into each block. EtherScan just do not show the receiptsRoot, stateRoot and the transactionRoot. But they are here!
Hope this may help someone trying to dive into Ethereum...