Agreed on his ' numbers ' being good enough to be really good . Not everyone is a 4 . 3 track star in the NFL . He is a bigger , and faster Wes Welker . He is a bigger and faster Danny Amendola . He is a hair slower but bigger Cole Beasley . He is pretty comparable to Randall Cobb . Yea , it would be sure nice to have any of them in the slot this year . <| sep |> A beat up old Ford Ranger . For some reason , everytime you push in the clutch the engine would die and the steering wheel would lock up until you turned the key and started it up again . I got very good at not needing a clutch so I didn ' t die going down mountain switchbacks . <| sep |> Uh . She asked . I said no . <| sep |> You ' ll get many different answers to this question . As a rule of thumb the more complex the answer , the closer it is to reality . My ELI 5 version is thisLight is made of particles called Photons , which always travel at the speed of light . If you stop a particle and measure it ' s mass , you are measuring it ' s rest mass , the rest mass of a photon is perfectly zero . Sadly , photons cannot be stopped and they travel so fast that normal physics don ' t apply to them , you ' ll need to use Relativistic physics . Relativity laws are wierd , and they allow a massless particle to exist as long as it travels at the speed of light . They also allow it to carry Kinetic Energy and Linear Momentum even if it ' s rest mass is zero . This is IMPOSSIBLE in classical physics . Relativity also contains the famous formula Emc 2 , it means that mass and energy are the same thing ! We found out that our photon can carry energy , hence it ' s carring MASS ! That ' s why photons are affected by gravity ! Relativity laws grant it some mass even if it shouldn ' t have any .