Bloop

Both investigations involve activities during the 1990s period. Also: Thematic overlap: sound, mystery, ultra-low frequency. Both filed under "Signals & Science" category.

Both investigations involve activities during the 2000s period. Also: Thematic overlap: mystery. Both filed under "Signals & Science" category.

Both investigations involve activities during the 2000s period. Also: Both filed under "Signals & Science" category.

Both investigations involve activities during the 1990s period. Also: Both filed under "Signals & Science" category.

Both investigations involve activities during the 2000s period. Also: Both filed under "Signals & Science" category.

Both investigations involve activities during the 2000s period. Also: Both filed under "Signals & Science" category.

Both investigations reference Pacific Ocean. Also: Both investigations involve activities during the 1990s period. Thematic overlap: mystery.

Both investigations involve activities during 1990s through 2000s periods.

Both investigations involve activities during 1990s through 2000s periods.

Both investigations reference Pacific Ocean. Also: Both investigations involve activities during the 2000s period.

Both investigations involve activities during 1990s through 2000s periods.

Both filed under "Signals & Science" category.

Both investigations involve activities during 1990s through 2000s periods.

Both investigations involve activities during 1990s through 2000s periods.

Both investigations involve activities during the 1990s period. Also: Thematic overlap: underwater, mystery.

Both filed under "Signals & Science" category.

Both filed under "Signals & Science" category.

Both investigations involve activities during the 1990s period.

Both investigations involve activities during the 2000s period.

Both investigations involve activities during the 1990s period.

Both investigations involve activities during the 1990s period.

Both investigations involve activities during the 2000s period.

Both investigations involve activities during the 1990s period.

Both investigations involve activities during the 2000s period.

Both investigations involve activities during the 1990s period.

Both investigations involve activities during the 1990s period.

Both investigations involve activities during the 2000s period.

Both investigations involve activities during the 2000s period.

Both investigations involve activities during the 1990s period.

Both investigations involve activities during the 1990s period.

Both investigations involve activities during the 1990s period.

Both investigations involve activities during the 2000s period.

Both investigations involve activities during the 2000s period.

Both investigations involve activities during the 1990s period.

Both investigations involve activities during the 1990s period.

Both investigations involve activities during the 1990s period.

Both investigations involve activities during the 1990s period.

Both investigations involve activities during the 2000s period.

Thematic overlap: mystery.

Thematic overlap: mystery.

Thematic overlap: mystery.

Thematic overlap: mystery.

Thematic overlap: mystery.

Thematic overlap: mystery.

Thematic overlap: mystery.

Thematic overlap: mystery.

Thematic overlap: mystery.

Thematic overlap: mystery.