The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mkrgsKuFE

Height: 178
Hash: 333366dde8d264e55a636dadb7f221ded59e384f5f6b64f0f3fb158a37859a07
Previous block: 311cf811e6b1f9fdf2c790ff7ebd1239b266a988271681b98efff31850ebeb86
Next block: 27e26be7a7b5c07d693a37d6743e789378f4e99d5694aa29a6ea4c40c23c723d
Weight: 912
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1544074763
Stripped size: 228
Size: 228
Nonce: 1
Merkle root: c16c16222b78f151116565e502fcbcd97044c12550f39b900b334bc7c2c6e19d
Median time: 1544074762
Difficulty: 4.656542373906925e-10
Confirmations: 24
Chainwork: 0000000000000000000000000000000000000000000000000000000000000166
Bits: 207fffff