Russia just released videos of its next generation of nuclear weapons - Here's what we know

The Poseidon is an underwater, high-speed nuclear-capable torpedo unlike any other nuclear weapon.

As opposed to other nuclear weapons in which lingering radioactivity is only a dangerous side effect, the Poseidon uses radioactive waste to deter, scare, and potentially punish enemies for decades to come.

It's supposedly surrounded by cobalt, which, when detonated, would spread a shroud of radioactive cobalt indiscriminately across the planet. One US analyst estimated that the cobalt would take 53 years to return to non-dangerous levels.

RIA Novosti reported on Thursday that tests of the Poseidon were "being completed."

In his March speech, Putin called the Burevestnik a "global cruise missile," and claimed it had unlimited range and was nuclear-propelled.

But the missile was tested unsuccessfully four times between November 2017 and February 2018, according to CNBC. It was again tested in May, and only flew 22 miles.

The Kinzhal, which is Russian for "dagger," is a plane-launched, nuclear-capable, hypersonic cruise missile that was successfully tested from a MiG-31BM in March.

According to the Russians, it has a top speed of Mach 10, a range of 1,200 miles and is even maneuverable at hypersonic speeds. With the 1,860-mile unfueled range of the MiG-31BM, the Kinzhal would have intercontinental strike capability.

However, several reports have been skeptical of the Kinzhal's capabilities. The War Zone's Tyler Rogaway even likened it to Russia's Iskander ballistic missile.

The new video released by the Russian MoD also shows a Tu-22 carrying the Kinzhal, which would give it an even greater range.

Read more about the Kinzhal's specs here.

The Peresvet laser's capabilities remain shrouded in mystery, but Russian state-owned media TASS has reported that they've "been placed at sites of permanent deployment ... Active efforts to make them fully operational are underway."

The Defence Blog has speculated that they could be jamming lasers, while two Russian military analysts have suggested that the lasers will be used for air and missile defense.